From the back cover:
"United Playtest does it again with this collection of original content from the best and brightest in the d20 arena. Official new adventures, spells, monsters and magic items direct from the publishers themselves.
Contributing d20 publishers include:
Skeleton Key Games; A Gaming Frontiers exclusive! A complete Orc source book from the people who gave us the critically acclaimed Forsaken of Glimm.
Atlas Games; The good people at Atlas give us not one but Two contributions featuring original content for both Crime and Punishment and En Route 2.
Mongoose Publishing; A peek at Coming of Shadows for the Babylon 5 setting."
and much more.