PuTTY - Popular free terminal application. Mostly used as an SSH client.
Onyx by Titanium - This website provides operating system utilities for macOS
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
iTerm2 - A terminal emulator for macOS that does amazing things.
Clean Master - Some users swear by it, some call it a glorified snake oil that does more harm than good. That can be said about any snake oil, but what specific brand of snake oil can boast almost a billion downloads around the world?