Etcher
Etcher – free and open source, cross platform and simple software for safe image writing to SD cards and USB drives
System programs and utilities
KDE Connect – software for connecting and syncing a computer with the KDE (and others) graphics environment and an Android smartphone
FSlint – utility to find and clean various forms of lint on a filesystem
Superpaper is a free and open-source, multi-platform software for automatically changing your desktop wallpaper with support for working with multiple monitors