TinkerTool - Tinker with the hidden settings of your Mac
Tron Script - Tron is a glorified collection of batch files that automate the process of cleaning up Windows systems.
Onyx by Titanium - This website provides operating system utilities for macOS
SKTools - SKTools is a multi-featured and easy-to-use application that is bundled with over 60 tools to help you boost the performance of the system.
Cocktail - General purpose system modify/repair utility
NETGATE Registry Cleaner - NETGATE Registry Cleaner cleans and defragment your registry.