Hacktivismo (http://hacktivismo.com [4]), purported human rights hacker group, have released a free steganography program which allows activists to exchange banned content over the Internet. This article contains links to the software and various articles about it.
Links
[1] https://www.pambazuka.org/author/contributor
[2] https://www.pambazuka.org/taxonomy/term/3305
[3] https://www.pambazuka.org/article-issue/75
[4] http://hacktivismo.com
[5] https://www.pambazuka.org/category/ict-media-security
[6] http://www.pambazuka.org/en/category.php/internet/9330