Orchid is a Tor client and library written in pure Java. It exposes a SOCKS5 listener for use as a Tor client, and can also be used to (nearly) transparently Torify new and existing applications that run on the JVM. It also runs on Android devices.
Anonplus is a highly flexible framework for creating decentralzied applications which are targeted at users. Anonplus also offers a social network free from interference.
A multiplayer online adventure game.
A minimalist Web server for configuration forms.