Optimizely - A/B testing you'll actually use.
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.
Dynamic Yield - Personalization & customer experience management
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.
XYplorer - File Manager for Windows