I found a site that is very detailed and interesting.
This site focuses on the Tibetan Vajrayana Buddhist Pantheon. Each of the beings named here represents a unique spiritual personality or essence. The principle beings are the five Dhyani Buddhas- the esoteric meditation Buddhas of the five colors found in The Tibetan Book of the Dead and other sources.
The contemplative poetry presented here evokes the thoughts and images of these beings often using the metaphor of music. Each poem can be looked at as a meditative exercise or visualization designed to tune the reader to the state of mind or spiritual environment of the being that is speaking.
Read more here:
http://www.buddhanature.com/
