Alkasir is a cross-platform, open-source and robust website censorship circumvention tool that also maps censorship patterns around the world.
See alkasir.com for general information about the software.
INITIAL OPEN SOURCE RELEASE NOTE
We are in the inital phase of open sourcing the source, platform and tools. Some unfinished code is still left to be integrated and published but the official builds are now done from the github repositories.
Se hacking for information on how to set up an development environment.