Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
htop - htop - an interactive process viewer for Unix. This is htop, an interactive process viewer for Unix systems. It is a text-mode application (for console or X terminals) and requires ncurses. Latest release: htop 2.
System Mechanic - System Mechanic uses patented technology to help fix PC errors and restore speed. The software is compatible with multiple versions of Microsoft Windows.
Atop - An advanced interactive monitor for Linux-systems to view the load on system-level and...
Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.