HandBrake is an open-source video transcoder.
Kabaligtaran
With Converseen you can convert, resize, rotate and flip an infinite number of images with a mouse click.
ClipGrab
ClipGrab is a free downloader and converter for YouTube, Vimeo, Facebook and many other online video sites.
Audio-Recorder
This amazing program allows you to record your favourite music and audio to a file.
Kdenlive
Kdenlive is an acronym for KDE Non-Linear Video Editor. It is primarily aimed at the GNU/Linux platform but also works on BSD and MacOS.