coopgammad

Description: Cooperative gamma server
Status: Feature complete
Source: https://git.maandree.se/coopgammad
Latest release: 1.3.1
License: ISC License (Internet Systems Consortium license)
Written in: C (ISO C11)

Programs that desire to change the gamma adjustment on a display should use coopgammad instead of talking directly with the display server (unless the display server natively implements cooperative gamma). By doing this, multiple programs can add filters to the display without overriding each others effects.