CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
iTerm2 - A terminal emulator for macOS that does amazing things.