I would like to propose a link thread for posting listings of sites on CS topics not tied to a specific language. Two that come to mind as being relevant to some of the more common questions would be the OS Dev Wiki, and the similarly themed but less established Compiler Dev Wiki. Rosetta Code would also be relevant, for comparisons between languages and paradigms. A few others to start with might be:
- The Dictionary of Algorithms and Data Structures
- The Portland Pattern Repository, home of the original WikiWikiWeb as well