Revo Uninstaller - Free fully functional download of Revo Uninstaller Pro and Revo Uninstaller Freeware.
Regshot - Quickly take a snapshot of your registry and then compare it with a second one.
GeekUninstaller - Efficient and Fast, Small and Portable. 100% Free. Clean Removal and Force Removal; Native X64 support; Easy-to-use User Interface; Uninstall Windows Store Apps. Geek Uninstaller. Download.
SysTracer - SysTracer - track registry and file system changes in your computer
UninstallView - UninstallView is highly scalable unwanted programs uninstalling tool that first make the list of all those programs that are installed on your system so that you can easily choose which program you want to remove from your system permanently.
Advanced Registry Tracer - Analyze changes made to the Windows Registry.