PuTTY - Popular free terminal application. Mostly used as an SSH client.
Autoruns - See what programs are configured to startup automatically when your system boots and you login.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
iTerm2 - A terminal emulator for macOS that does amazing things.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC