FileProInfo - It's All About Files, Software, Online Tools - 100% Free
Communifire - Enterprise Social Collaboration Software
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
DigitalChalk - Online Training Software and Learning Management System (LMS)
GroupDocs - GroupDocs is a web-based service for online document sharing, collaboration and management.
Workplace by Facebook - Connect everyone in your company and turn ideas into action.