Another open source option, Power8 provides a self-sorting menu of commonly used applications, a set of flyouts for the main Start menu app hierarchy, and flyouts for Computer, Libraries, Control Panel, Administrative Tools, and Network shortcuts. The old search functionality is also replicated, Metro features (charms, hot corners, etc.) are disabled, and -- one very nice touch -- Windows 7 taskbar jump lists are retained. Among the drawbacks, Power8 is short on configurable features.
Since InfoWorld last dabbled with Power8, its developers have made several upgrades and fixes, including boosting the file-system event watching and a more flexible updater.
Author: Power8 Team
Cost: Free (open source)