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

Well there are a few that I use on a day2day basis - I am on a windows OS btw

1 : "Discord" ( Of course )

2 : "Everything" ( I don't have the patience to look for any particular file in my drives and directories I just type the name and it pulls it up for me. It uses a prebuilt Index of your system to bring you results in mini-seconds Highly recommend it )

3: "PangoBright" ( It's helps me reduce the brightness of monitor even further at night than my default monitor settings allow )

4: "Gyazo" ( It's always good to have a GIF/pic Capture Application handy )