SysTracer - SysTracer - track registry and file system changes in your computer
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Advanced Registry Tracer - Analyze changes made to the Windows Registry.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
RegistryChangesView - Compare 2 snapshots of Windows Registry, display all changes, and optionally generate .reg file.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.