Cleaner One Pro is the best Mac cleaner that can optimize memory usage and speed up your Mac . With the minimalist and easy-to-use interface, you can visualize, manage and free up your storage space in just one click. Cleaner One Pro also provides some advanced features including start up manager, application manager and file shredder. Keep your Mac clean and automatically tune it up for the best performance.
CleanMyMac X - Clean, protect and speed up your Mac
Winaero Tweaker - Universal tweaker software which supports Windows 7, Windows 8, and Windows 8.1.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
Cybertron Privacy Eraser - 1-click browsing history deletion, PC optimization & more
GIGATweaker - GIGATweaker is a powerfull and compact application that allows you to optimize and tweak your OS.