Community
- RPGPGM.COM — From AS/400 to IBM i: a blog with many good articles.
- COMMON Deutschland and COMMON Österreich — the IBM i user groups.
- PUB400.COM — a free IBM i account for learning and testing.
Open source for IBM i
- Scott Klement — HTTPAPI, YAJL, a superb socket tutorial and much more.
- JCRCMDS — great utilities by Craig Rutledge.
- rdi-open-source — iSphere and Rapid Fire for RDi.