Its interesting features include, ClickPad, Unity desktop, RhythmBox, Libre Office and many more. Here are some of the free must have apps for Ubuntu 12.04 LTS.

Deluge

Well, torrent clients like Bit Torrent, uTorrent have captured a great share of user base. And if you do not mind trying out new programs and apps, then give a try to Deluge. This torrent client has so many plugins to offer which makes it a powerful option.

apt-get install deluge

Rest here