Add messages to bitcoin transactions. Transfer any asset over the Internet. - http://coinspark.org
THE COLORED COINS WALLET The next-generation colored coins platform Includes p2ptrade: a built-in peer-to-peer exchange - http://chromawallet.com
Omni Layer
Open-source, fully-decentralized asset platform on the Bitcoin Blockchain - http://www.omnilayer.org
"Omnicoin is an experiment in the creation, implementation, and integration of a cryptocurrency with MyBB community software in mind. Originally created by a member of HackForums.net it's grown beyond that initial ideal and has moved into a wider realm of possibility. With a new launch of version 2 (OMCv2), a new team, and renewed focus Omnicoin promises to gain ground which no other crypto currency has tread" - http://www.omnicoin.org - https://bitcointalk.org/index.php?topic=962832.0