Very useful, but the :: separators are distracting. I think that most first-time visitors are looking to scan your collection for a particular technology (that's what I did).

This view [http://devcheatsheet.com/?view=tag] is more readable. How about using the 'tag' view layout, but add categories to make browsing easier.

Another suggestion: add 3 or 4 'similar cheat sheets' to each cheat sheet to facilitate browsing and reduce bounce rates.