What is the most important program on your computer other than internet browser?

my important things beside the browser

- visual studio code
- bootstrapp studio
- transmit/wsftp/filezilla => depend on the OS's
- iterm/terminator => depend on the OS's
- thunderbird/newton =>depend on the OS's
- Illustrator
- photoshop
- Telegram Desktop
- Whatsapp Desktop
- Skype Desktop
- Stremio
- XDM
- Team Viewer
last but not least
- Microsoft Office / Libre Office