Amarok: Audio player for KDE featuring drag and drop playlist creation, collection-indexing support, album cover support, and much more.
K3b: Fully functional CD burning software with many features.
KsCD: Audio CD player.
KWave: A simple sound editor for KDE.
Kaffeine: Video media player that supports multiple player engines, letting Kaffeine access CDs, DVDs and network streams.
KPlayer: A multimedia player based on MPlayer.
KMix: Sound mixer applet.
Kid3: An MP3 ID3 editor for KDE.
RealPlayer 10: Media player that plays RealAudio, RealVideo, MP3, 3GPP Video, Flash, SMIL 2.0, JPEG, GIF, PNG, RealPix, RealText and more.
Kino Video Editor: Digital video data editor allows you to record, create, edit and play movies recorded with DV camcorders.