Useful PPAs that I frequently use on Ubuntu linux (or its derivative).

Web links to the PPAs. Check their description, then you can add them to the system using (sudo) apt-add-repository command:

1. Audio apps (LMMS ecc.), latest – KXStudio-Debian Applications PPA
2. Blender, latest and edge – Thomas Schiex ppa
3. Gimp and Gmic, latest – otto06217 ppa
4. Grub Customizer, latest – Daniel Richter ppa
5. Inkscape stable, latest – “Inkscape Developers” team ppa
6. Krita, latest – Krita Lime by Dmitry Kazakov ppa
7. Nvidia drivers, latest – xorg-edgers ppa
8. Nvidia drivers, stable – “Ubuntu-X” team ppa