- zTidbitz - a collection of links and technotes from the Institute for Data Center Professionals.
- zFavorites - IBM's collection of links (beware the odd broken one however)
- System z Security - IBM z Security Landing Page
- RACF goodies - some freebies from IBM, like Powertoys from Microsoft
- zSecure - the landing page for IBM Tivoli zSecure, the best System z Security suite on the market bar none.
- Pirean - System z software and services from Pirean led by yours truly.
I'm also working on PCIDSS compliance, for which I've read cover to cover this piece from @sec which has been causing a bit of a stir on LinkedIn
Keep watching for a post on this also, and lots more besides.