Browsing on wikipedia about some cryptography topics, I found this: http://en.wikipedia.org/wiki/Deniable_encryption, and it sounds like a good idea, so I want to try it.
I noticed that some programs I always use were already using it behind the scenes. See OTR
Anyway, my questions are:
1) Is there any recommended software for this?
2) Is it possible to have full disk deniable encryption? Currently I'm using the regular full disk encryption that ships with Ubuntu 12.04.
From the link posted by @Bob, about Truecrypt:
"There has been no known comprehensive review of the source code by a qualified cryptographer. Thorough security code review and testing is hard, tedious, and painstaking work, and very few people have the skills to do it."