Freenet

Freenet is a free open source community project to provide a un-censorable distributed database that can be interacted with in various way. Some of the most popular applications running on Freenet at-the-moment include: FProxy, an internet like system where you can browse ‘freesites’ using a standard web browser). FMS, (free messaging service), software that allows for mailing style forums. Freetalk, next generation web-of-trust based messaging and forum software.

The bitcoin community is working on a developing bitcoin-on-freenet, this project has the goals of being able to fully interact with bitcoin anonymously through freenet, potentially creating a darknet of bitcoin users.