GeeXboX

Enna Mediacenter   (Compare Project)

Mostly written in C

License: lgpl21_or_later

OpenELEC - Media Center Operating System   (Compare Project)

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MoviX   (Compare Project)

Mostly written in shell script

License: Unknown

Kodi   (Compare Project)

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License: gpl

VLC media player   (Compare Project)

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Entertainer Media Center   (Compare Project)

License: gpl

MediaPortal   (Compare Project)

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License: gpl

MythTV   (Compare Project)

Mostly written in C++

License: gpl

Moovida   (Compare Project)

License: gpl3

XBMC for Xbox   (Compare Project)

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License: gpl, lgpl