A Visual MP3 editor which allows users to trim, join and split any number of MP3s to varying lengths and sizes, apply fade in/out effects, normalise their entire collection to the same volume level - and much much more besides.
Mindloop BPM Calculator This Beat per Minute Calculator has a pretty interface and includes these features: calculates beats per minute, beats per sample, length in seconds, length in samples, sample rate(hz).
Discombobulator BPM calculator This Beat Per Minute Calculator can calculate a sample's beats per minute, beats per sample, rate, sample length in seconds or samples. It has a form that will show you all the equations.
Autotagga AutoTagga is a free utility that lets you add ID3 tags to every .mp3 files in a folder. Choose the directory that contains your .mp3 files, then pick from one of three ways the .