Being unemployed right now like many others, I decided the best way to maintain my Java web development skills was to fully build and deploy my own web site.
It is a free Tutorials directory, for now much Java-oriented, but it should cover almost every IT aspect when there are enough contributors.
It obeys to Open Knowledge principle: put some notes on a common web site which will become a real Tutorial after some moment when enough people have done the same, you share your knowledge with the others and in return benefit from theirs, the same than Open Source but applied to your IT experience.
All tutorials are and will remain free (you can right-click and save any HTML page as for any other web page, so there can't be any protection).
I need not only contributors, but too some beta-testers at: EthicJobs, I fixed most of bugs but some may still have gone unnoticed, and I need feedback from users for look-and-feel, usability, usefulness of this site, etc...