Here I collect some examples of projects using Block Chain Technology.
Design and architecture of following projects architecture involves block chains, but contrary to the Bitcoin 
- where the block chain transactions are mainly (except of a number experimental uses) used to "to send money between accounts", projects like Ethereum and Eris have wider implementation. To put it simple - transactions don't necessarily have to represent money, or correspond to a monetary value. Like a language , they can represent anything which needs to be authentic and verifiable and communicated as such: from law to peer-reviewed scientific papers and other large number of possible uses.
Building Utopia is an arts project using block chain technology for a decentralised consensus simulation of political and economic system.
Other projects involving blockchain technology. We haven't personally met developers teams behind following projects, so can't verify their status:
- Factom
- Counterparty
- Filecoin
- Gems
- NameCoin(stub)