HN user
Without a license your repo is technically not open-source, only source-available. A license says what people are allowed to do with the code, so if you don't add a license, they're not allowed to do anything.
It will remain functional, although its parameters are changing.
Web Browser: Firefox
Email Client: Evolution
Terminal: Terminator
IDE: Vim or Geany
Basic Text Editor: Vim or Geany
Office Suite: LibreOffice
Video Player: VLC or SMPlayer
Music Player: Quod Libet
Screen recording: Kazam or OBS
Vivaldi's source code is available https://vivaldi.com/source/
Sadly for us that price will be increased to $699 in a few days. https://puri.sm/posts/2018-devkits-are-shipping/