Optimizely - A/B testing you'll actually use.
GroupDocs - GroupDocs is a web-based service for online document sharing, collaboration and management.
Evergage - Evergage's real time web personalization software can help you boost engagement, increase revenue and drive more conversions. Web personalization software that's easy to use.
FileProInfo - It's All About Files, Software, Online Tools - 100% Free
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.