This is the lists on WWE.com of wrestlers moving to other brands.  I bet other wrestlers will be released soon, so many have not been used in a long time.

Moving to the Raw roster:
Gail Kim
Alicia Fox
Jack Swagger
Evan Bourne
Mark Henry 

Moving to the SmackDown roster:
Matt Hardy
Finlay
The Hart Dynasty - David Hart Smith, Tyson Kidd & Natalya

Moving to the ECW roster
Shelton Benjamin
Goldust
William Regal
Brie & Nikki Bella