Rippling - One directory for employee information across IT, HR, legal, finance and facilities.
FileProInfo - It's All About Files, Software, Online Tools - 100% Free
Personably - Create amazing on-boarding experiences for new hires
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.
Slite - Your company 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.