Try pub400.com – the famous public IBM i server for !
Now you will have access to the most recent operating system IBM i 7.3 with all new features you need to learn about the fantastic operating system IBM i and its open source capabilities.
The use of this server is free for everyone’s learning purposes including 250MB of storage. Please take note that commercial usage is not allowed.
IBM’s *FREE* Power Development Platform (PDP) is the bomb dot com. PDP is Power Cloud that enables developers and offers no-charge remote access to IBM hardware. check it out