Wikipedia
PenAgain
The PenAgain is an ergonomic writing device developed by Pacific Writing Instruments, Inc. It was designed to alleviate stress and reduce the risk of repetitive strain injury while writing.
Writing with the PenAgain differs from writing with a traditional cylindrical pen. The writer's index finger sits in the Y-shaped device, so that the weight of the writer's hand directs pressure to the pen’s tip. This eliminates the need to grip the pen and push the tip into the paper. The index finger guides the tip of the pen.