Collabbit was a web application built to help aid agencies coordinate disaster relief efforts. It was initially built as part of the Humanitarian FOSS project, and was used by the New York City branches of the Red Cross and Salvation Army.
While an undergrad at Wesleyan University I did research into attacks on Tor. I wrote my honors thesis on the practicality of end-to-end correlation attacks and contributed a simulation algorithm to the paper Effectiveness and detection of denial-of-service attacks in tor.