Gimp
https://www.gimp.org/
Astroberry.io
https://www.astroberry.io/
Kstars
https://edu.kde.org/kstars/
Stellarium
https://stellarium.org/es/
oaCapture/oaLive
https://www.openastroproject.org/
Raspberrypi
https://www.raspberrypi.org/
Darktable
https://www.darktable.org/
Indi
https://www.indilib.org
Siril
https://siril.org/
PHD2
https://openphdguiding.org/
Firecapture
http://www.firecapture.de/