Desktop Publishing:
Gimp: Gaphics (Linux, Mac, Win)
Gimp: Portable (Win)
Gimp.App Images (Mac)
Scribus Publishing (Linux, Mac, Win)
Genealogy Analysis:
GenealogyJ: Genealogic Data-Viewer (Linux, Mac, Win)
Geneotree: Genealogy Tree(Linux, Win)
Gramps: Family Tree (Linux, Win)
Lifelines: Genealogy Tree (Linux, Mac, Win)
PhPGedView: Your Old Ancestors(Linux, Mac, Win)
Geographic Information Systems (GIS, GPS):
FreeGIS (Linux, Mac, Win)
GMapCatcher: Street Maps (Linux, Mac)
OpenStreemap: Free Geographic Data
QuantumGIS (Linux, Mac, Win)
Graphics: CAD Software:
Appleseed: Production Rendering (Linux) Ares: CAD (Linux, Mac, Win)
Blender: 3D Animation (Linux, Mac, Win)
BRL-Cad: 3-D CAD (Linux, Win)
Cycas 2+ 3D Architecture (Linux, Win)
Cycles: Production Render
DraftSight: Free Cad (Linux, Mac, Win)
Electric: VLSI Design System (Linux, Mac, Win)
FreeCAD: 3D Design (Linux, Win)
Inkscape Graphics (Linux, Mac, Win)
LibreCAD: CAD Application (Linux, Mac, Win)
LuxCoreRender: 3-D Render (Linux, Mac, Win)
Medusa4: CAD (Linux)
Open Cascade: 3-D (Linux)
QCad: 2-D Cad (Linux, Mac, Win)
Sweet Home 3-D Home Design (Linux, Mac, Win)
Varkon: Parametric CAD-Tool (Linux, Mac, Win)
Wings 3D (Linux, Mac, Win)
Varkon 2D-3D CAD (Linux)
YafRay Ray Tracer (Linux, Mac, Win)
Graphic Resources:
Art4linux: Art (Linux)
Batch Image Editor (Linux, Mac, Win)
BirdFont: Create Fonts (Linux, Mac, Win)
Char Tr: Mindmapping (Linux)
Cenon Graphics (Linux, Mac)
CinePaint (Linux)
Coppermine: Web Album (Linux, Mac, Win)
DIA: Drawing, Graph (Linux, Win)
DigiKam: Photo Management (Linux, Mac, Win)
Emesene: Webcam (Linux, Win)
Enblend: Image Blend (Linux, Mac, Win)
Eye of Gnome Image Viewer (Linux)
F-Spot: Photo Management (Linux)
Fluendo Multi Media (Linux)
Freemind: Mindmapping (Linux, Win)
Freeplane: Mindmapping (Linux, Win)
Free Ruler (Mac)
Gestalter: Vector Drawing (Linux)
GImage View: Image Viewer (Linux)
Gimp: Gaphics (Linux, Mac, Win)
Gimp: Portable (Win)
Gimp.App Images (Linux, Mac)
Glimpse: See Gimp (Linux, Mac, Win)
GPicView: Fast Image Viewer (Linux)
Goh: (cf. Opencanvas) Graphics Editor (Linux)
Gloobus: (cf. Quicklook) (Linux)
GraphTool (Linux)
Graphic & Design Apps: The Best (Linux, Mac, Win)
Gthumb Image Viewer (Linux)
Graphviz Graph Visualization (Linux, Mac, Win)
gvSIG: GI SUser (Linux, Mac, Win)
Hugin: Panorama GUI (Linux, Mac, Win)
Gimp: Gaphics (Linux, Mac, Win)
Gimp: Portable (Win)
Gimp.App Images (Mac)
Scribus Publishing (Linux, Mac, Win)
Genealogy Analysis:
GenealogyJ: Genealogic Data-Viewer (Linux, Mac, Win)
Geneotree: Genealogy Tree(Linux, Win)
Gramps: Family Tree (Linux, Win)
Lifelines: Genealogy Tree (Linux, Mac, Win)
PhPGedView: Your Old Ancestors(Linux, Mac, Win)
Geographic Information Systems (GIS, GPS):
FreeGIS (Linux, Mac, Win)
GMapCatcher: Street Maps (Linux, Mac)
OpenStreemap: Free Geographic Data
QuantumGIS (Linux, Mac, Win)
Graphics: CAD Software:
Appleseed: Production Rendering (Linux) Ares: CAD (Linux, Mac, Win)
Blender: 3D Animation (Linux, Mac, Win)
BRL-Cad: 3-D CAD (Linux, Win)
Cycas 2+ 3D Architecture (Linux, Win)
Cycles: Production Render
DraftSight: Free Cad (Linux, Mac, Win)
Electric: VLSI Design System (Linux, Mac, Win)
FreeCAD: 3D Design (Linux, Win)
Inkscape Graphics (Linux, Mac, Win)
LibreCAD: CAD Application (Linux, Mac, Win)
LuxCoreRender: 3-D Render (Linux, Mac, Win)
Medusa4: CAD (Linux)
Open Cascade: 3-D (Linux)
QCad: 2-D Cad (Linux, Mac, Win)
Sweet Home 3-D Home Design (Linux, Mac, Win)
Varkon: Parametric CAD-Tool (Linux, Mac, Win)
Wings 3D (Linux, Mac, Win)
Varkon 2D-3D CAD (Linux)
YafRay Ray Tracer (Linux, Mac, Win)
Graphic Resources:
Art4linux: Art (Linux)
Batch Image Editor (Linux, Mac, Win)
BirdFont: Create Fonts (Linux, Mac, Win)
Char Tr: Mindmapping (Linux)
Cenon Graphics (Linux, Mac)
CinePaint (Linux)
Coppermine: Web Album (Linux, Mac, Win)
DIA: Drawing, Graph (Linux, Win)
DigiKam: Photo Management (Linux, Mac, Win)
Emesene: Webcam (Linux, Win)
Enblend: Image Blend (Linux, Mac, Win)
Eye of Gnome Image Viewer (Linux)
F-Spot: Photo Management (Linux)
Fluendo Multi Media (Linux)
Freemind: Mindmapping (Linux, Win)
Freeplane: Mindmapping (Linux, Win)
Free Ruler (Mac)
Gestalter: Vector Drawing (Linux)
GImage View: Image Viewer (Linux)
Gimp: Gaphics (Linux, Mac, Win)
Gimp: Portable (Win)
Gimp.App Images (Linux, Mac)
Glimpse: See Gimp (Linux, Mac, Win)
GPicView: Fast Image Viewer (Linux)
Goh: (cf. Opencanvas) Graphics Editor (Linux)
Gloobus: (cf. Quicklook) (Linux)
GraphTool (Linux)
Graphic & Design Apps: The Best (Linux, Mac, Win)
Gthumb Image Viewer (Linux)
Graphviz Graph Visualization (Linux, Mac, Win)
gvSIG: GI SUser (Linux, Mac, Win)
Hugin: Panorama GUI (Linux, Mac, Win)
Graphic Resources:
Image Apps (Linux, Mac, Win)
ImageGlass (Windows)
ImageMagick: Editor (Linux, Mac, Win)
Image Viewers (Linux, Mac, Win)
Imagination: DVD Presentation Maker (Linux)
imgSeek: Photo Image Viewer (Linux)
Inkscape Graphics (Linux, Mac, Win)
Irfanview: Fast Graphic Viewer (Win)
Karbon14 Vector Graphics (Linux)
Kolourpaint (Linux)
KuickShow: Image Browser Viewer (Linux)
Krita: Graphical Tool (Linux)
Ksquirrel Image Viwer (Linux)
Labyrinth: Mindmapping (Linux)
LinuxCad Drafting (Linux)
LyX The Document Processor (Linux, Mac, Win)
Meshlab: Edit Graphics (Linux, Mac, Win)
Mindmapping: Organization App (Linux, Mac, Win)
Morevna: Anime (Linux, Mac, Win)
Mypaint: Open Source Painting (Linux, Mac, Win)
Nathive: Linux Image Editor (Linux)
MTPaint: Paint Editor (Linux, Win)
Open Clipp Art Library (Linux, Mac, Win)
OpenMotif Graph Interface (Linux, Mac)
Paintbrush: Mac Paint-Like (Mac)
Paint.Mono: Image Editing (Linux, Mac)
Paint.Net: Image Editing (Win)
Panorama Tools (Linux, Mac, Win)
Pencil2D: Animation (Linux, Mac, Win)
Photomagic (Linux)
PhotoQt (Linux, Win)
PixelPost: Photoblog (Linux, Mac, Win)
Picasa: Photo Management (Linux, Win)
PicView: Picture Viewer (Win)
Pinta: Image Editor (Linux, Mac, Win)
Piwigo: Web Album (Linux, Mac, Win)
Ptex: Disney Animation (Linux, Mac, Win)
QIV: Quick Image Viewer (Linux)
Rapid Photo Downloader (Linux, Win)
Rawstudio: Photo Converter (Linux)
RawTherapee: Photo Converter (Linux)
Refocus: Pluggin for GIMP (Linux, Mac, Win)
Seashore: (cf. GIMP) Image Editor (Mac)
Simple Scan: Scanning (Linux)
Shotwell (cf. Picasa) Photo Organizer (Linux)
Skencil: Vector Drawing (Linux, Mac)
SketchUp 3D (Linux, Mac, Win)
Sk1 Vector Graphics Editor (Linux, Mac, Win)
Sodipodi: Vector Drawing (Linux, Win)
SWFTools: Graphic Tools (Linux, Win)
Sweet Home 3-D Home Design (Linux, Mac, Win)
SV-Editor: Drawing Editor (Linux)
Synfig: 2D Animation (Linux, Win, Mac)
Thuban: Geographic Viewer (Linux, Win)
TuxPaint: Children (Linux, Mac, Win)
UFRaw: Manipulate Images (Linux, Mac, Win)
Viewnior: Elegant Image Viewer (Linux)
Unshake Refocus Photos (Linux, Win)
VYM: Mindmapping-Line (Linux)
W3C: Web Graphics (Linux)
Xara Graphics (Linux, Mac)
Xmind: Mind Mapping (Linux, Mac, Win)
Xnview (Linux, Mac, Win)
Xpaint: Paint Editor (Win)
GQview: Image Browser (Linux)
Xfig (Linux)
ZGV: Image Viewer (Linux)
Image Apps (Linux, Mac, Win)
ImageGlass (Windows)
ImageMagick: Editor (Linux, Mac, Win)
Image Viewers (Linux, Mac, Win)
Imagination: DVD Presentation Maker (Linux)
imgSeek: Photo Image Viewer (Linux)
Inkscape Graphics (Linux, Mac, Win)
Irfanview: Fast Graphic Viewer (Win)
Karbon14 Vector Graphics (Linux)
Kolourpaint (Linux)
KuickShow: Image Browser Viewer (Linux)
Krita: Graphical Tool (Linux)
Ksquirrel Image Viwer (Linux)
Labyrinth: Mindmapping (Linux)
LinuxCad Drafting (Linux)
LyX The Document Processor (Linux, Mac, Win)
Meshlab: Edit Graphics (Linux, Mac, Win)
Mindmapping: Organization App (Linux, Mac, Win)
Morevna: Anime (Linux, Mac, Win)
Mypaint: Open Source Painting (Linux, Mac, Win)
Nathive: Linux Image Editor (Linux)
MTPaint: Paint Editor (Linux, Win)
Open Clipp Art Library (Linux, Mac, Win)
OpenMotif Graph Interface (Linux, Mac)
Paintbrush: Mac Paint-Like (Mac)
Paint.Mono: Image Editing (Linux, Mac)
Paint.Net: Image Editing (Win)
Panorama Tools (Linux, Mac, Win)
Pencil2D: Animation (Linux, Mac, Win)
Photomagic (Linux)
PhotoQt (Linux, Win)
PixelPost: Photoblog (Linux, Mac, Win)
Picasa: Photo Management (Linux, Win)
PicView: Picture Viewer (Win)
Pinta: Image Editor (Linux, Mac, Win)
Piwigo: Web Album (Linux, Mac, Win)
Ptex: Disney Animation (Linux, Mac, Win)
QIV: Quick Image Viewer (Linux)
Rapid Photo Downloader (Linux, Win)
Rawstudio: Photo Converter (Linux)
RawTherapee: Photo Converter (Linux)
Refocus: Pluggin for GIMP (Linux, Mac, Win)
Seashore: (cf. GIMP) Image Editor (Mac)
Simple Scan: Scanning (Linux)
Shotwell (cf. Picasa) Photo Organizer (Linux)
Skencil: Vector Drawing (Linux, Mac)
SketchUp 3D (Linux, Mac, Win)
Sk1 Vector Graphics Editor (Linux, Mac, Win)
Sodipodi: Vector Drawing (Linux, Win)
SWFTools: Graphic Tools (Linux, Win)
Sweet Home 3-D Home Design (Linux, Mac, Win)
SV-Editor: Drawing Editor (Linux)
Synfig: 2D Animation (Linux, Win, Mac)
Thuban: Geographic Viewer (Linux, Win)
TuxPaint: Children (Linux, Mac, Win)
UFRaw: Manipulate Images (Linux, Mac, Win)
Viewnior: Elegant Image Viewer (Linux)
Unshake Refocus Photos (Linux, Win)
VYM: Mindmapping-Line (Linux)
W3C: Web Graphics (Linux)
Xara Graphics (Linux, Mac)
Xmind: Mind Mapping (Linux, Mac, Win)
Xnview (Linux, Mac, Win)
Xpaint: Paint Editor (Win)
GQview: Image Browser (Linux)
Xfig (Linux)
ZGV: Image Viewer (Linux)