DebateNet is a debate and event management system for debate organizations. It allows users to register for debates and find event information, and allows administrators to appoint debates, manage events, and monitor on-site sign-in at the venue. Mark worked with fellow debate member Ryan Speers on DebateNet.

Facebook Idol is a Facebook application that allows people to apply to be a contestant for the Facebook Idol first of their network among its members, and then the global Facebook Idol. Contestants may upload videos demonstrating their talents (if they do choose). No talent necessary (but recommended.) Reached 13,000 users and 1,500 daily active users. Sold to a private investor in October 2007.

TopVideo is a Facebook application that lets people put their favorite YouTube video on their profile, have friends comment on videos, view your friends' videos, view the top videos on Facebook, and more.

I Want a Virtual iPhone, formerly I Have an iPhone, allows you to choose between some graphics that show that you have an iPhone.