Similar to Calibre

Okular

Qt Creator

Razor-qt

RPCS3

Scribus

SMPlayer

TeamViewer

TeXstudio

TeXworks

VirtualBox

VLC media player

Otter Browser

Kaffeine

Calligra

Krita

Clementine (software)

BitBake

Bitmessage

Buildbot

Celery (software)

Ceph (software)

Cryptomatte

Flowblade

Genshi (templating language)

GNOME SoundConverter

GNU Mailman

GRPC

Gunicorn