I have students fill out this worksheet whenever they are involved in a group project. It asks them to evaluate their own contributions to the group and has them rate the contributions of the other members in the group.
Here is my store address: http://www.teacherspayteachers.com/Store/Raina
I like the two different charts, and that they have a chance for self-evaluation, as well as group. Really nice (and quick) way to receive student feedback