FileProInfo - It's All About Files, Software, Online Tools - 100% Free
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.
FILExt - Open, view and convert files online
AirMason - Employee Handbooks Done Right. Start from a template and send a beautiful employee handbook that they actually want to read. Publish digitally or as a PDF.
Convertio - File Conversion in the Cloud