• PC/Geos / #FreeGEOS
• Browser-based Live Demo: English / German / Browser dev - How it works

• Old programs for Geos: Desktop versions / GeoBook / Zoomer
• Old programs for Geos: Nokia 9000/9000i/9110 Communicator [auch auf Deutsch]
  
• HP OmniGo 100/120
• The unofficial GeoBook and Super PowerNote Cheat Page
• Tools for Geos Development

• Nathan Fiedler's unofficial Geos pages are now archived on this server.
• Symbian / EPOC32 - experiments for Nokia's Symbian platform
  • Proof-of-concept CPU usage monitoring
  • Some (mostly outdated) links
• OS/2 - a few programs I wrote for OS/2.
  • Tools and documentation for the INF/HLP file format
  • A simple "diff" file generator for the PATCH command
  • MAKELOGO clone to compile new boot logos
  • Running OS/2 commands from a DOS prompt

• DOS - old DOS applications I developed a looong time ago.
  • MemView - memory map viewer for MS-/DR-/Novell-DOS
  • Compiler/decompiler for Borland Help Files
  • "Return to Dunes" - sand picture simulation (graphics)
• Miscellaneous
  • Protocol documentation for the Casio WQV-1 Wrist Camera
  • Things about Windows I learned the hard way - a collection of various PC-related things that took me a while to figure out, in the hope of making them easier to find for others
    
  • Some little-known facts about Windows 32-bit heap management
  • Photography: Panoramas and Anaglyphs [photoset on flickr]
  • cibyl - an open-source C-to-Java bytecode translator by Simon Kagstrom that I have made a few contributions to.
  • Meir Tsvi has developed an interesting experimental fork of cibyl that does C-to-MSIL bytecode translation, for cases where porting to C# or "managed C" is not an option for creating Windows Phone 7 apps (such as the Waze crowd-sourced navigation app)
  • Retrocomputing: some games for the TI-99/4A on github