- Brixcc – on Windows, nothing beats the combination of Brixcc and NQC when it comes to compatibility of all retro MindStorms pbricks! Recommended for anyone.
- NQC – Not Quite C. A compiler for LEGO bytecode programs that can be used for the RCX, NXT, Spybotics and Scout. Uploads firmware, downloads datalogs, etc. A must have!
DIY (homebrew sensors etc.)