Tech Tool Store - Tech tool store is an IT professional application which contains more than 600 free technician tools packed in a simple, fully featured interface.
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
Tron Script - Tron is a glorified collection of batch files that automate the process of cleaning up Windows systems.
Duplicate Cleaner - Duplicate Cleaner: the fastest and most popular tool for finding duplicate files. Over 1 million downloads: Get your copy now! Free and Pro versions available.
Autoruns - See what programs are configured to startup automatically when your system boots and you login.
Czkawka - Multi functional app to find duplicates, empty folders, similar images etc.