A program/network used for music analysis. Moodlogic Inc. runs an online database which stores information on the mood, tempo, genre, etc. of mp3 songs. The Moodlogic client is a free program which can be used to download profiles in order to catalog the user's digital music collection. The user can then generate playlists of songs which correspond to one another. The client can also be used to manually profile songs and submit these profiles for addition to the Moodlogic database.

As of this write-up, the client is in a public beta stage, and the database is not terribly comprehensive, though it is rapidly growing.