"There has been no known comprehensive review of the source code by a qualified cryptographer.[46][44] Thorough security code review and testing is hard, tedious, and painstaking work, and very few people have the skills to do it. There was, however, a functional evaluation of the deniability of hidden volumes in an earlier version of TrueCrypt by Schneier et al. that found security leaks." [1]
[1]https://en.wikipedia.org/wiki/Truecrypt#Reasonable_paranoia
I'm not sure if you consider it reputable or not, but the source has been available, at least for recent versions. I'm not sure about the current version.
http://www.symantec.com/connect/downloads/symantec-pgp-deskt...
Insightful encryption app developer would hide his identity in order not to be bullied into putting backdoors.