Chris Walker works with InterNews Europe and the Tactical Technology Collective. He is also leading the project NGO-in-a-box. He is also a fellow alum of The Fletcher School. Chris gave an overview of Torbrowser and Psiphon.
Torbrowser is also available as an add-on to Firefox. One challenge associated with Torbrowser is that it is a large file to download, although you can download the software in parts. Since there is considerable technical and human surveillance in closed regimes, Torbrowser has been made to look like a regular browser such as Internet Explorer.
Psiphon is a censorship circumvention solution that allows users to access blocked sites in countries where the Internet is censored. psiphon turns a regular home computer into a personal, encrypted server capable of retrieving and displaying web pages anywhere. One advantage of psiphon is that now software needs to be downloaded. YouTube videos can also be uploaded securely.