tool list:
Pick one and mark that you are working on it's review
- Gimp (picture editing)
- Laidout (layout, picture)
- Inkscape (vector drawing tool)
- Scribus (Desktop plublishing)
- Potrace (vectorisation bitmap images)
- Autotrace (vectorisation tool)
- Contourtrace (extension of autotrace) http://www.openorienteering.org/apps/contourtrace/
- ghostscript (PDF manipulation / optimization)
- pdftk (PDF manipulation)
- Graphviz (Grapheditor)
- Fontforge (fonteditor)
- Birdfont (fonteditor)
- Chrome (Webbrowser)
- Firefox (Webbrowser)
- Krita (painting)
- Blender (3D modeling)
- Cirkuit https://wwwu.uni-klu.ac.at/magostin/cirkuit.html
- Dia https://wiki.gnome.org/Apps/Dia/
- Fyre http://fyre.navi.cx/
- Hugin http://hugin.sourceforge.net/
- Darktable (RAW image manipulation)
- Imagemagick (image manipulation, command line) (also: http://www.fmwconcepts.com/imagemagick/index.php )
- Karbon (Vector drawing tool) https://www.calligra.org/karbon/
- LeoCad (Lego modeling) https://www.leocad.org/
- LibreCAD (Computer Aided Design) http://librecad.org/cms/home.html
- OpenSCAD (scripted CAD) http://www.openscad.org/
QCad (Computer Aided Design) https://qcad.org/en/— Done by Colm- Open Orienteering (orienteering map maker) http://www.openorienteering.org/apps/mapper/
- Qgis (Geographic Information System manipulation) https://qgis.org/en/site/
- Pinta (image editing) https://pinta-project.com/pintaproject/pinta/
- Plater (postion models for 3d printing, it also has an auto layout mode) https://github.com/kliment/Printrun
- Mandelbulber (Mandelbrot image generation) https://sites.google.com/site/mandelbulber/
- Grommit-MPX (Annotations on screen, meant for use during presentations) https://github.com/bk138/gromit-mpx
- PlotDrop (graphs) http://plotdrop.sourceforge.net/
- Structure Synth (generating 3D structures by a design grammar) http://structuresynth.sourceforge.net/
- paper.js (Javascript library aimed at making tools, http://paperjs.org )
- d3.js (Javascript library for data visualisation https://d3js.org/ )