The Quick Reference Site

A very useful site for programmers is the Quick Reference Site, maintained by Tim Sinaeve. This site features:

• Quick Reference Cards, short sheets cointaining the main commands for e.g. utils like Subversion or vi and so, and programming languages. The most valuable resource, although some cards can have 8 pages!
• E-books, that range from manuals to learning and reference books.
• Papers and tutorials (self described).

Hope you find it as useful as me!