Основная ссылка: https://getgammy.com/downloads.html
Установка: sudo apt install (or other package manager equivalent):

• build-essential
• libgl1-mesa-dev
• libxext-dev
• libxxf86vm-dev
• qt5-default
• qt5ct*

* Optional. Recommended if you are running a DE/WM without Qt integration (e.g. GNOME).

Build and run with these commands:

• git clone https://github.com/Fushko/gammy.git
• cd gammy
• qmake
• sudo make install
• gammy