LuaStudio - Free game development tool/engine. Create games and other graphic focused apps on Windows using Lua/LuaJIT programming language. Export them to many platforms including iOS, Android and Mac.
winreg-cli - Command line tool with a fluent API for modifying Windows registry.
WizTree - Excellent, small utility application allows users to quickly find large files on a hard drive.
ZoomIt - It is a screen zoom and annotation tool for technical presentations. It runs unobtrusively in the tray and activates with customizable hotkeys to zoom in on an area of the screen, move around while zoomed, and draw on the zoomed image.
HandBrake - High performance video encoding and conversion tools with a nice GUI.