Contrary to my older lists from 2010 and 2013 this is a shorter list, only of programs I use regularly.

Content Creation

• Affinity Designer - vector graphics Commercial
  

• Affinity Photo - raster graphics Commercial
  

• Audacity - audio editing Open Source
  

• Blender - 3d modeling (and other things) Open Source
  

• Davinci Resolve - video editing and color correction Free
  

• Digikam - photo management Open Source
  

• Vim - text editor Open Source
  

Utilities

• 7-zip - archiving tool Open Source
  

• Flux - reduces blue light of screen to allow for better sleep Free
  

• Fork - great ui for git Free
  

• Hex Fiend - fiendly hex editor Open Source
  

• iTerm2 - console replacement for macos Open Source
  

• mirkes Tiny Hexer - hex editor for windows Free
  

• SpeedCrunch - calculator Open Source
  

• tarsnap - online backup for the paranoid Open Source
  

• TortoiseHg - great ui for mercurial Open Source
  

• VLC - video and audio player Open Source
  

• Xee³ - image viewer for macos Commercial
  

• XnView - image viewer for windows Free
  

Other

• Discord - all-round communication platform + other things Free
  

• rubiTrack - log and analyze sport activities Commercial
  

Console

• ledger-cli - command-line double-entry accounting software Open Source
  

• mutt - mail client Open Source
  

• newsboat - rss reader Open Source
  

• youtube-dl - downloads video (or audio) from youtube Open Source
  

Firefox Add-Ons

• Vertical Tabs Reloaded
• Vim Vixen
• uMatrix