Another option: JAP (Score 1)

Too bad nobody mentioned JAP yet. It's similar to TOR, except it uses pre-defined anonymizing proxies rather than random nodes (so you know exactly who you're trusting). It will also circumvent censorship, and it's pretty much unblockable. Every client has an option built in to share his bandwidth for people who are behind censoring firewalls, esentiallly becoming another public proxy. This means that if you need to get around censorship, you can have JAP (the client program) automatically supply you with a fresh, unblocked proxy address. Check it out at http://anon.inf.tu-dresden.de/index_en.html Psiphon gets publicity like crazy, but it actually doesn't do much besides being a simple proxy. Especially, it doesn't solve the main problem of how to find an unblocked IP to use. While JAP doesn't have slick marketing (new website coming soon, I hope), the technology is great, please take a moment to check it out. Elmar (Disclosure: I am currently one of developers of JAP, as part of my Master's thesis)