- Open Source apps
- Fantasy Consoles and emulators
- TIC-80 - Runs on Windows, Linux, Mac OS X, Android, Raspberry PI
- Maps
- Organic Maps - Runs on Android
- Fantasy Consoles and emulators
- Electrical / Electronics
- sci.electronics.repair FAQ - I fondly remember my days, pouring through this, in an attempt to repair my CRT monitor.
- Programming
- DIY
- Simplifier
- Oriparts - Car parts catalog with part numbers
- i10 Forum
- Concrete lathe
- Passive cooling
- Mathematics
- K-12
- Online Shopping