MP3 mixing software, "targeting every DJ from bedroom DJs to professional superstars" according to the developers.
The Free Home Version includes BPM detection, effects, automix, and many other features.
From the site: "It helps profile your songs by saving important properties, such as the BPM, key, time signature, styles, comments, and more. The software includes automatic BPM and key detection, as well as tools to determine this information yourself--a BPM tapper and a MIDI keyboard."
With version 1.7.2, Scratch LIVE now has built-in BPM detection and saving to the ID3 tag.
Suggested retail price is $725 (July 2007).
Automatically detects BPM but does not write it to iTunes.
From the site: "for live performance or simply to enjoy your music, djay offers everything you need plus exciting innovations".
Price: $49.99 (as of March '09).
MixShare's Rapid Evolution
It helps profile your songs by saving important properties, such as the BPM, key, time signature, styles, comments, and more.
Not as fancy as the professional mixing tools, but it is free.
The BPM application is separate from the main DJ application.
Web site in French.
Detects BPM but does not save to ID3v2 tag.
For Windows, OSX, and Linux.
Detects BPM and saves to ID3v2 tag.
Also includes a standalone batch BPM analyzer tool.
US$25 (free, 30 minutes demo).
Complete DJ application, not just a counter.
Ask the DJ
Automatically matches and mixes beats from different tracks.
Includes BPM detection.
US$29 (trial version available).
DJ Mix Lite
DJ Mix Lite is designed to play continuous music with cross fading, beat matching mixes between songs.
Doesn't seem to store in the MPS file the BPM value that it computes.
- BPM Studio