Inkscape Extensions

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Revision as of 22:16, 30 November 2016 by Moini (talk | contribs) (Test results for 'Render Living Hinge')
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This is a working list of all known external Inkscape extensions, with a link to where it can be downloaded. It's part of a project to have all or as many extensions as possible available on the website (https://inkscape.org/en/download/addons/). So it will be changing over time. Note that it does Not include the extensions listed on this page http://wiki.inkscape.org/wiki/index.php/Extension_repository.

If anyone knows of extensions which are not on either list, please let us know (via Docs mailing list: http://lists.sourceforge.net/mailman/listinfo/inkscape-docs) (or any other way you might alreay know of - I had to remove my contact info here, because of increased spam)

Fyi, ~suv's list is here: https://gist.github.com/su-v/9965739



Name

Links

Notes

Draw Lab Equipment https://github.com/jcaude/SVGMapping/tree/master/inkscape/extensions has known unit issue, no license
Reselect Multiple Objects (Add classes) http://www.inkscapeforum.com/viewtopic.php?f=5&t=18483&p=69760#p69752 Adds CSS classes to and removes them from selected objects, works great in 0.91. GPLv2+. Author: Mark Crutch
Bezier Envelope Extension https://github.com/shlomif/Bezier-Envelope-for-Inkscape Works in 0.91, deforms an object to fit into a curved envelope (the default extension ignores curves), GPLv2+, Shlomi is not the original author.
PSD Import http://pernsteiner.org/inkscape/psd_import/
PDF/CMYK Exporter http://wiki.inkscape.org/wiki/index.php/ExportPDFCMYK doesn't work in 0.91
PDF/TIFF CMYK Export http://wiki.softwarelivre.org/InkscapeBrasil/ExportarPDFCMYK
http://wiki.softwarelivre.org/InkscapeBrasil/ExportarTIFFCMYK
neither works in 0.91
Inkscape OutputPRO http://jonata.org/inkscape/outputpro/
http://www.inkscapeforum.com/viewtopic.php?f=11&t=5943&start=25#p45043
under development
Inkscape Guide Tools https://github.com/sambody/inkscape-guide-tools GPLv2, works very well in 0.91 - creates margin guides, grid guides, centered guides and can also remove either horizontal, vertical or angled guides
Tabbed Boxmaker http://www.inkscapeforum.com/viewtopic.php?p=38785 GPLv3, doesn't work with 0.91 anymore, successor is tabbed boxmaker extension by paulh-rnd, see below.
Tabbed Boxmaker https://github.com/paulh-rnd/TabbedBoxMaker works with 0.91, licensed GPLv2, successor of original tabbed boxmaker extension by Elliot White, additional extension for boxes for 'Schroff Elby' storage racks.
Boxmaker https://github.com/hellerbarde/inkscape-boxmaker Fork of the original BoxMaker by Elliot White, less sophisticated than the one by paulh-nrd
OpenTabbedBoxMaker https://github.com/ThoreMehr/inkscape-OpenTabbedBoxMaker Appears to be a fork of the original boxmaker extension by Elliot White, with fixes for 0.91. Author removed all mention of original author. Response to bug report pending.
Tabbed Boxes Living Hinge http://www.reidb.net/LaserLivingHinges.html A fork of the original BoxMaker by Elliot White, which adds some movable hinges created by cuts. Doesn't work in 0.91.
Render Living Hinge http://wiki.lvl1.org/Inkscape_Extension_to_Render_a_Living_Hinge
https://github.com/drphonon/Inkscape_LivingHinge
Works in 0.91, renders a living hinge (bendable after cutting) onto a given rectangle. Uploaded to website.
Elliptical Box Maker https://github.com/BvdP/elliptical-box-maker use released version at https://github.com/BvdP/elliptical-box-maker/releases/tag/v1.0, master branch currently broken, fixed version available at https://github.com/Moini/elliptical-box-maker. Merge request pending.
Image Aligner https://bitbucket.org/matyilona/imagealigner
http://www.inkscapeforum.com/viewtopic.php?f=31&t=19207
InkTan https://github.com/Rhysun/inkTan Draws tangents between two circles. Does not draw tangents between ellipses (despite the error message telling something different). Works in 0.91, GPLv3+.
Convert to SVG Font http://myscrappinginspiration.blogspot.no/2015/01/extension-to-simplify-font-creating.html
Remove Redundant Lines https://bugs.launchpad.net/inkscape/+bug/521988/+attachment/1144117/+files/removeredundant.inx
https://bugs.launchpad.net/inkscape/+bug/521988/+attachment/1150930/+files/removeredundant.py
works in 0.91
Multiple Pages http://sourceforge.net/projects/inkscape-pages/
Export Node Coordinates http://www.inkscapeforum.com/viewtopic.php?f=5&t=8826 doesn't work in 0.91
InkPACKING https://github.com/Moini/inkpacking
http://www.inkscapeforum.com/viewtopic.php?p=75710#p75710
works in 0.91, GPLv2
SVG 2 Embroidery http://svg2embr.wasbo.net/index.php
Nice Charts https://github.com/Florianjw/NiceCharts works in 0.91, included in 0.92
Sheet Metal Cone https://github.com/quirxi/SheetMetalCone/
http://www.quirxi.net/code/python/sheet_metal_cone/overview.html
already uploaded
Multiple Difference https://github.com/ryanlerch/inkscape-extension-multiple-difference strange behaviour (creates a new document, users need to copy the items back into their document), improved version is Multi-Bool extension
Multi-Bool https://github.com/Moini/inkscape-extensions-multi-bool fork of Ryan Lerch's Multiple difference, already uploaded to website
Inkscape Animation https://github.com/ray-hplus/inkscape-animation Fixed for 0.91 on Linux, not tested on Windows, GPLv2, author contacted, unfortunately, github account is now deactivated (and license info, which was in a comment on an issue, was lost).
Batch Export https://github.com/ray-hplus/inkscape-batch-export link is dead
Fix Broken Multi-Line Text https://github.com/chelobaka/fix-text-lines
Inkscape to PovRay http://www.arakne.es/en/dessign/3d/inkscape-svg2pov-exporting-svg-files-to-povray/
https://inkscape.org/en/gallery/item/4442/#c446
Inkscape to PovRay as Lathe http://www.arakne.es/en/dessign/inkscape-svg2pov-new-version-export-as-lathe/
https://inkscape.org/en/~pacogarcia/%E2%98%85inkscape-to-povray-exporter
export as lathe
Shapes http://www.arakne.es/en/dessign/inkscape-python-extension-shapes/
https://inkscape.org/en/gallery/item/4436/
Tables http://sourceforge.net/projects/inkscape-tables/
Inkscape to OpenSCAD Converter v6 http://www.thingiverse.com/thing:25036
Font4OpenSCAD http://www.thingiverse.com/thing:50444
Write.SCAD http://www.thingiverse.com/thing:16193
The EggBot Extensions http://wiki.evilmadscientist.com/The_Eggbot_Extensions
InkCut http://inkcut.sourceforge.net/ and https://sourceforge.net/projects/inkcut/
Set ViewBox http://pernsteiner.org/inkscape/viewbox/ can be set via document properties in 0.92
JPG Export https://github.com/giacmir/Inkscape-JPEG-export-extension works in 0.91
Optical Rotary Encoder Discs http://www.dgkelectronics.com/inkscape-extension-for-creating-optical-rotary-encoder-discs/
https://github.com/Hyvok/Inkscape-rotary-encoder-disk-generator
Embroidery https://github.com/stesie/inkscape-embroidery not working on ubuntu 12.04 with inkscape 0.48.3.1
Hyphenation http://thottingal.in/blog/2009/10/03/inkscape-hyphenation-extension/
https://github.com/santhoshtr/inkscape-hyphenation
Laser Engraver http://www.instructables.com/id/Pocket-laser-engraver/step7/Getting-the-software-ready/
http://www.slackersdelight.com/instructables/laserengraver.zip
Colorblindness http://kaioa.com/node/91 Filter to simulate colorblindness available in 0.92
Bobbin Lace http://web.uvic.ca/~vmi/laceTools/Inkscape1/inkscape1.html
Polyhedra Nets http://www.fabhub.net/entry.php?27-Polyhedra-addiction&goto=next
GIF Animate https://mccormick.cx/news/entries/inkscape-animation
DeviantART http://doctormo.org/2011/05/19/deviantart-plugins-released/ doesn't work yet
9 Patch https://inkscapeninepatch.codeplex.com/
Linerider http://recusantmind.50webs.com/
Scale Generator https://github.com/cskulkarni/inkscapescalegenerator
Scale Generator https://github.com/pulsar256/inkscapescalegenerator
Render Scale https://github.com/brathering82/inkscape renders scales (linear and circular) for use on self-built devices and in drawings, works in 0.91
XIA http://xia.dane.ac-versailles.fr/index_en.html already on extensions page
Plasma Rename http://notmart.org/index.php/Graphics/Easier_Plasma_themes_creation
Bullets https://ongardie.net/blog/inkscape-bullets/
Placeholder https://github.com/Xaviju/inkscape-placeholder already on extensions page
Gear and Sproket Profiles https://github.com/attoparsec/inkscape-extensions
Kabeja DXF Import Filter http://kabeja.sourceforge.net/docs/projects/inkscape.html Java extn
Raster2Laser Gcode Generator https://github.com/305engineering/Inkscape
Countersheet https://github.com/lifelike/countersheetsextension
https://boardgamegeek.com/thread/299033/inkscape-extensions-boardgame-development
Hexmap https://github.com/lifelike/hexmapextension
https://boardgamegeek.com/thread/299033/inkscape-extensions-boardgame-development
Embed and Crop http://cellbio.emory.edu/bnanes/svg-embed-and-crop/
https://github.com/bnanes/svg-embed-and-crop
Java extn
WaterColorBot http://wiki.evilmadscientist.com/WaterColorBot and http://watercolorbot.com/
Unicorn http://www.thingiverse.com/thing:5986
https://github.com/martymcguire/inkscape-unicorn
Big Blue Saw DXF Export http://www.bigbluesaw.com/saw/big-blue-saw-blog/general-updates/big-blue-saws-dxf-export-for-inkscape.html
List Fonts https://tamentis.com/hacks/inkscape/ Works in 0.91, lists all fonts used in the document (popup with copy-able text)
Shirt Waist http://www.taumeta.org/?page_id=247
Remove Guides http://screencasters.heathenx.org/blog/2009/06/09/inkscape-extension-remove-guides/comment-page-1/
Speleo3 https://github.com/speleo3/inkscape-speleo
3D to SVG http://www.thomas-holder.de/projects/3dtosvg/
Skencil Import http://www.filewatcher.com/d/openSUSE/x86_64/Productivity/Graphics/Vector%20Editors/inkscape-extensions-skencil-0.48.1-5.1.x86_64.rpm.11242.html
RealScale https://github.com/Moini/inkscape-realscale-extension/ works in 0.91, already uploaded
Better DXF Output http://www.bobcookdev.com/inkscape/inkscape-dxf.html
Better Better DXF Output http://tim.cexx.org/?p=590
Inkscape-Silhouette https://github.com/fablabnbg/inkscape-silhouette
THLaser https://github.com/lansing-makers-network/thlaser-inkscape-plugin
https://github.com/parogers/thlaser
Android Export https://github.com/ChristianBecker/inkscape-android-export
Android Export https://github.com/headsortailsgames/androidexport might be same as above?
Ink2Canvas https://github.com/hacktoon/ink2canvas
OpenSCAD Polygon Output https://github.com/martymcguire/inkscape-openscad-poly
Layer Slicer https://github.com/mattharrison/Inkscape-Slicer-Extension
SVGO https://github.com/juanfran/svgo-inkscape
Spine Exporter https://github.com/kbristow/InkscapeSpineExporter
Spine Exporter https://github.com/jleclanche/inkscape-spine-exporter
Mockup Machine https://github.com/keinerweiss/InkscapeMockupMachine
MrBeam https://github.com/mrbeam/mrbeam-inkscape-ext
Onionskin https://github.com/lingo/inkscape_onionskin
Checkerboards https://github.com/jeffkayser/inkscape-checkerboard
Rack Gear https://github.com/braingram/inkscape_rack_gear
Write TeX https://github.com/wanglongqi/WriteTeX
KM Laser Bundle https://github.com/KnoxMakers/KM-Laser
Measure All Paths https://github.com/dustinandrews/InkscapeExtensions
InkMerge https://github.com/bitterjug/inkmerge
Connect the Dots https://github.com/HereticPilgrim/inkscape-connectthedots
Grids https://github.com/cds4/inkscape-grids
OpenSCAD-DXF-Exporter https://github.com/brad/Inkscape-OpenSCAD-DXF-Export
http://www.thingiverse.com/thing:14221
SVG2SIF https://github.com/nikitakit/svg2sif historical - no longer needed since Inkscape natively exports SIF now
SVG2CSS https://github.com/shogo82148/svg2css
Multiscale https://github.com/bcbnz/inkscape-multiscale
Inkscape Navigator https://github.com/kaleidos/inkscape-navigator
Multi-Page PDF Export https://github.com/wvengen/inkscape-addons/tree/master/extensions
Bansai https://github.com/larscwallin/bansai
Export to Roland CutStudio https://github.com/mgmax/inkscape-roland-cutstudio
Modela Engravers https://github.com/matthewbeckler/modela_inkscape_extension
FabLab Extensions https://github.com/bumblebeefr/fablab-inkscape-plugins
Isometric Projection https://github.com/jdhoek/inkscape-isometric-projection
Laser Plugin for Attractor Makerspace https://github.com/attraktorhh/inkscape_laserplugin
Apply Transforms https://github.com/Klowner/inkscape-applytransforms
Grid Strip Creator https://github.com/fablabnbg/inkscape-gridstripcreator
Guides Creator https://github.com/Ale-/inkscape-gs
Label Annotations https://github.com/davidosterberg/inkscape-label
Compute Centroids https://github.com/thedatachef/inkscape-centroid
Underline Text https://github.com/mcjohnalds/inkscape-underlinetext
Generator https://github.com/galou/inkscape_generator similar to http://wiki.inkscape.org/wiki/index.php/Extension_repository#Generator
QR Codes https://github.com/alawibaba/inkscape-qrcode needs to be compared with updated, included QR-Code generator in 0.92
Dimensioning https://github.com/Rutzmoser/inkscape_dimensioning
SphereBot Gcode https://github.com/firebovine/inkscape-spherebot
http://www.thingiverse.com/thing:7656
modified version of Unicorn extension (https://github.com/martymcguire/inkscape-unicorn)
Cricut Pre-Processor https://github.com/mdtopham/inkscape_cricut
TCNC https://github.com/utlco/tcnc
GIMP PSD https://github.com/junichi11/gimp_psd
Inkscape2JSON https://github.com/shanadeshana/Inkscape2JSON
SVG2tikz https://github.com/kjellmf/svg2tikz might be same as https://github.com/Alwnikrotikz/inkscape2tikz and maybe this?? https://github.com/halamalala/inkscape2tikz
EuroRack Panel Designer https://github.com/THX2112/Eurorack-Panel-Designer
Render Globe https://github.com/hoday/InkscapeRenderGlobeExtension
Ctrl-Cut https://github.com/Metalab/ctrl-cut-inkscape
Android Icon Export https://github.com/kokufu/inkscape-android-icons-export
Uke Chord Dictionary https://github.com/marcosfeijoo/inkscape-uke-chord-dictionary
Uke Chord Maker https://github.com/marcosfeijoo/inkscape-uke-chord-maker
Glue https://github.com/mrsalo/inkscape_glue_extension
Import Grace (ARG) https://github.com/patrickbwarren/inkscape-grace-import
Kerf Correction https://github.com/braingram/inkscape_kerf_correction
Custom Iterator https://github.com/sgmanohar/inkscape_custom_iterator
Pattern Extnsions https://github.com/lis-epfl/inkscape_pattern_extensions
LaserCut Designs https://github.com/zerjillo/laserCutInkscapeExtensions
LaserCut DXF https://github.com/MakeICT/inkscape-lasercut-dxf
Batch Effect https://github.com/jturner314/inkscape-batch-effect
Chord Box Maker https://github.com/marcosfeijoo/inkscape-chord-box-maker
Animation https://github.com/nathanjent/inkscape-animation-extension
https://github.com/savra57/inkscape-animation-extension
several extensions in 1
Drawer Cabinet Maker https://github.com/ThoreMehr/inkscape-DrawerCabinetMaker
Due Laser https://github.com/justdue/Plugin-inkscape
Batch Export PNG, SVG https://github.com/ray-hplus/inkscape-batch-export
Formaker Laser https://github.com/TobiasBodewig/Inkscape-FormakerLaser-Plugin
Laser Engraver Gcode https://github.com/ringo2k/laserengraverInkscapeplugin
Slider Electrodes Generator https://github.com/henningpohl/Inkscape-Slider-Electrode-Generator
Export Survex SVX https://github.com/patrickbwarren/inkscape-survex-export
Chain Paths https://github.com/fablabnbg/inkscape-chain-paths
Laser Cut Sequence https://github.com/L0laapk3/inkscape-laser-sequence-extension
Deep Ungroup https://github.com/cw/inkscape-ungroup-deep
Text Generator https://github.com/Xaviju/inkscape-text-generator WIP
Link SVG https://github.com/fsantini/inkscape_LinkSVG
Proto Ready https://github.com/droid001/ProtoReady
InkSlides https://github.com/rainwoodman/inkslides
XeTexText https://github.com/virrapax/XeTexText
Armature https://github.com/brianbv/armature
InkFlex https://github.com/gamecide/inkflex
DXF2SVG https://github.com/duckinator/dxf2svg
DXF2SVG https://github.com/mduggan/dxf2svg might be the same as above, not sure
SVG Slice https://github.com/lee-b/svgslice
Extract Elements https://github.com/larscwallin/ExtractElements easy to fix 0.91 unit issue, exported items are not centered on page, no license
Ink2SCAD https://github.com/nickthecoder/ink2scad
Cubify https://github.com/Phidelux/Cubify
Path AutoNotch https://github.com/BvdP/path_autonotch
Patterns https://github.com/kirchner/patterns sewing patterns
InkCutter https://github.com/slandis/InkCutter
Gdadin https://github.com/Alpt/gdadin
SVG2SCAD https://github.com/Spiritdude/SVG2SCAD
Gradient Stop https://github.com/etiennelaurin/gradient_stop
Inkex SVG Guitar Chord https://github.com/pablus/Inkex_svgGuitarChord
Hardy Hershey Text https://github.com/HardRainbow/Hardy-Hershey-Text
Create Sketch Layer https://github.com/larscwallin/CreateSketchLayerINX
SVG Presenter - InsertMovie https://github.com/mmpi/SvgPresenter/tree/master/inkscapeExtensions
CloneAlongPath https://github.com/esuarezsantana/clonealongpath
Ink2SmartCanvas https://github.com/CWBudde/Ink2SmartCanvas
UUID Labeller https://github.com/cfobel/uuid_labeller
InkData Table https://github.com/adamlabadorf/inkdatatable
Paths2OpenSCAD https://github.com/d0d63/paths2openscad
EggBot Extensions for Egg Duino https://github.com/bartebor/eggbot_extensions
HeightMapMaker https://github.com/gebhardtkevin/HeightMapMaker
Heidengrave https://github.com/johnerlandsson/Heidengrave
Split https://github.com/hacktoon/split
Triangulate https://github.com/nicolaromano/triangulate
Render Axis https://github.com/nicolaromano/render_axis
Fibonacci Pattern https://github.com/mostekcm/beautyfullday_fibonaccipattern
LaserEngraverFor3DPrinter https://github.com/roboticseq/laserengraverFor3DPrinter
PDF2Pub https://github.com/lchamon/pdf2pub
PreCut https://github.com/starshipfactory/precut
Box4Robot https://github.com/1i7/box4robot
J-Tech-Photonics-Laser-Tool https://github.com/A-Metaphysical-Drama/J-Tech-Photonics-Laser-Tool
InkSyntax https://github.com/etlapale/inksyntax
Delete Above https://github.com/glvnst/delete_above
P2p2json https://github.com/lifelike/p2p2json
Frustifier https://github.com/kitschysynq/frustifier
Shelves (CNC) https://github.com/BvdP/shelves
Figure Digitizer Extensions https://github.com/ToreAad/FigureDigitizer
Export Layer Combinations https://github.com/fluffware/export_layer_combinations
Embroidery https://github.com/garfieldkass/embroidery
Hotwire https://github.com/florianfesti/hotwire
CSV Output https://github.com/tbekolay/csv_output
Tabbed Intersections https://github.com/dsysko/tabbed_intersections
Destructive Clip https://github.com/funnypolynomial/DestructiveClip
Ink2FXL https://github.com/pettarin/ink2fxl
InkImpress https://github.com/rools32/InkImpress JessyInk fork
przerabiator https://github.com/mazakodron/przerabiator non-English, unable to translate
Fabric.js Components https://github.com/hers-belgrade/fabric.js_components
rePresent https://github.com/JensBee/rePresent
Dopplemaker https://github.com/lisjump/dopplemaker
Pyjagrid https://github.com/yannlossouarn/Pyjagrid
Centerline Trace https://github.com/fablabnbg/inkscape-centerline-trace Works in Inkscape 0.91 on Linux and OSX. Improved version available at https://github.com/Moini/inkscape-centerline-trace . Requires autotrace (OS X install instructions: http://www.getmacapps.info/install-autotrace-on-macos). GPLv2.
ExportPresentation https://github.com/fbianco/InkscapeExportPresentation
Views https://github.com/patricktoohey/InkscapeExtensions/tree/master/Views
Prune Gradients https://github.com/patricktoohey/InkscapeExtensions/tree/master/Cleanup
Animation https://github.com/pedrosacramento/inkscape-animation
Dots https://github.com/Neon22/inkscape_extensions
Zoetrope https://github.com/Neon22/inkscape-Zoetrope already uploaded
Bobbinlace https://github.com/d-bl/inkscape-bobbinlace several extns
Gcode https://github.com/jstenback/inkscape-gcode
I Learn and Play https://github.com/robvandenbogaard/I-learn-and-play-Inkscape
3D Open SCAD https://github.com/tdasse/gdesign-inkscape several
Sudoku https://github.com/neocogent/inkscape-sudoku
ChartScape https://github.com/caiosba/inkscape-chartscape
PHN Output https://github.com/tatt61880/phn_output
Visicut https://github.com/aur-archive/inkscape-extension-visicut
Replace Font https://github.com/oaa36/inkscape-replace-font
LiveLink https://github.com/livelink/livelink-inkscape-extensions
Grid-Maker https://github.com/sambody/inkscape-grid-maker
Musical Scale Generator https://github.com/piroxiljin/inkscape-music-scale-generator original from googlecode repo
Musical Scale Generator https://github.com/triAlexIljin/inkscape-music-scale-generator out of date - useabove
SVG2JPG https://github.com/sepastian/inkscape-svg2jpg
VC1520 https://github.com/nanoflite/inkscape-VC1520
Laser Engraver https://github.com/FlexiLee/laserengraver
PlotInk https://github.com/evil-mad/plotink helpers for EggBot extns
EqTexSVG https://github.com/julienvitard/eqtexsvg
Tileset-Tools https://github.com/PatrickKennedy/tileset-tools
Fibonacci Pattern https://sourceforge.net/projects/fibonacci-pattern-inkscape-ext/ might be same as Fibonacci Pattern further above?
TimInk https://sourceforge.net/projects/timink/
InkPlot https://sourceforge.net/projects/inkplot/
sVgLE https://sourceforge.net/projects/svgle1/
Shape Creator http://inkscapeextensionshapecreator.sourceforge.net/
Python Iterator http://inkscapepythoni.sourceforge.net/
QML Exporter http://qmlexporter.sourceforge.net/
Wirecutter http://sourceforge.net/projects/wirecutter-inkscape-plugin
AI Compatible EPS Exporter http://primandras.hu/inkscape-ai-compatible-eps-exporter/
not sure? http://www.inkscapeforum.com/viewtopic.php?p=89409#p89409 just noticed this on a forum - seems to be an improved version, but I'm not sure which extension it improves
O-Scape http://www.nopesport.com/news/1343-o-scape-free-orienteering-mapping-software and https://sourceforge.net/projects/o-scape/ it's said to work with 0.48, extension set for mapping for orienteering
The following seem to be "personal" extensions.
It's not clear whether they are made for wide use or not, or whether they work or not.
Or they may duplicate others in this list.
https://github.com/scottkirkwood/scott-inkscape
https://github.com/ghoreishi75/scott-inkscape
https://github.com/tophsic/inkscape-extensions
https://github.com/pmosakowski/inkscape-extensions
https://github.com/twitwi/inkscape-extension-set
https://github.com/Metaphore/inkscape-mtphr-extensions
Scale to Size https://github.com/vovythevov/inskcape_extensions
The following extensions are included in Inkscape 0.91:
Hershey Text http://www.evilmadscientist.com/2011/hershey-text-an-inkscape-extension-for-engraving-fonts/ included in 0.91
Scour http://www.codedread.com/scour/ already included in Inkscape 0.91 and previous versions as Save as -> Optimized SVG
The following are questionable. They either call themselves extensions (or plugins) but don't have INX files, or they're in a language I can't read.
One claims to be a repository of extensions but is empty. But I thought worth a mention, just in case. You can decide :-)
VIM Insert https://github.com/Bercio/vim-inkscape-insert
https://github.com/boris-r-v/inksa all in Russian (I think)
TlxGDL http://tlxgdl.sourceforge.net/
InkStuff https://sourceforge.net/projects/inkstuff/
SAGE-SCADA Animation Graphic Editor https://sourceforge.net/projects/sage-scada/