General/Features

• What's GRASS? Read on for an overview.
• GRASS FAQ and answers 
• You might want to know detailed features of GRASS GIS. Find a short feature description.
• GRASS 5.0/5.4: New features are floating point support in raster format and a new sites data format.
• GRASS 6: New features are integrated such as DBMS support, 2D/3D vector geometry, PostGIS support, vector networking etc.
• A brief overview: GRASS 4.2.1 with containing general information, supported data formats, projections etc (partialy outdated)
• Es gibt auch ein GRASS Informationen zu GRASS in deutscher Sprache (online, partially outdated)).
• Aide pour GRASS 5 - assistance pour GRASS 5 en français.
• These are the simulation models already integrated in GRASS.
• GRASS and SQL-support
• GRASS and interfaces to geo/statistical software
• ResearchIndex: GRASS related articles in database
• Google Scholar: GRASS related articles in database
• Selected journal papers
• CiteULike: GRASS related articles in database

Man-Pages

• GRASS 6 manual pages HTML
• GRASS 5.3 manual pages HTML | PDF
• Command Translations: Espagnol (incompleta)
• MANUAL pages search engine
• GRASS 4.x online manual pages HTML | PDF
• Short command reference (Postscript, 2 pages)
• GRASS 4.1 User's reference manual (Postscript, 556 pages)

Programming

• GRASS Programmer's Manual