The heart of harmonic mixing. Use this to recognize the key of the Track. There are some tools on the market that does the same, but Mixed in Key stands out as the best.
Platinum notes will improve the sound of a track and might help you to get more fluid sounding sets or the software can be used to improve the quality and sound of a DJ set as a post production tool. The software is developed by the same guys that make Mixed in Key, so you can get a bundle on these two.
Traktor has a good Traktor integration and this can easily be the best place to manage your music for Traktor. Atleast for the ones of you who use Macs.
Winamp has alot of cool features like audio recognition and tag editing.
Tag & Rename
Great for editing multiple tracks at once.
Advance playlist editor,
Rapid Evolution 2,
Traktor Pro Launcher,
TSI-view & Print
Info will be updated. ;)