- Mike's IBM PCjr Page: Comprehensive information about PCjr.
- PCjr Web Forums: Talk to other PCjr enthusiasts.
- PCjr Cartridge ROMs: ROM dumps of PCjr cartridge software
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.