TL:DR; Listen to your work when you want!
Let the computer read your documents so that you can listen to them later.
Acala 3GP Movies Free is an easy-to-use, but powerful 3GP software. It can copy all movies to mobile phone, pocket pc, blackberry, palm phone, and make ringtone music. You will be impressed by its amazing high transcoding speed and output quality.
WinX M2TS to iPad Video Converter for Mac is free video converter for Mac OS X, with it's solution for free converting video files to sorts of video formats. It can convert different video formats to iPad, iPod, iPhone, Apple TV HD.
BPM Counter is a fast and accurate beats per minute detector for MP3 music. It may be helpful for DJs who need to get information about entire music collection quickly and for any kind of remixing/sampling stuff.