Instagrasp
Instagrasp is an entierly 3D printed gripper that can be made on a hobby grade printer. It is based on the Yale OpenHand T42, but is significantly easier and cheaper to assemble. TPU parts replace molded finger parts and threads (tendons). The whole hand can be assembled in 10minutes, using only a screwdriver and hammer
Link: Instagrasp
E-Troll
The E-TRoll (Enhanced Tactile Rolling) Hand is a 3DoF Robotic Hand/Gripper with a prismatic palm and two revolute fingers. This hand is originally designed for rolling prismatic objects (and collecting tactile data), but it can be used for grasping, caging, and other in-hand manipulation techniques.
Link: E-Troll