ProtoShares uses a new Momentum Proof of Work (POW) algorithm that is designed to be GPU and ASIC resistant.

Official Thread: https://bitcointalk.org/index.php?topic=325261.0
Web Page: http://invictus.io/
Official Forum: https://bitsharestalk.org/index.php
Current Prices: Coinplorer Bter Cryptsy Poloniex

Because I didn't found any related thread for Protoshares I would like to create one for all the people who wants to sell or buy Protoshares.
So feel free to post below your offers.