NOPcon is a free non-profit hacker conference without any sales pitches. The third edition has released its call for papers and will take place September 16th, 2014 in Istanbul, Turkey.
You can download it from the following link: https://packetstormsecurity.com/files/download/127524/nopcon2014-cfp.txt
Source: https://packetstormsecurity.com/files/127524/NOPcon-2014-Call-For-Papers.html