Culture Codes - Company culture decks aggregated all in one place
FileProInfo - It's All About Files, Software, Online Tools - 100% Free
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
Culture Your Culture - Finally, the much needed step-by-step "how to" for culture
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.