Propeller.com is a social media link-sharing website that is similar to Digg.com and Reddit.com. Somebody submits a story and if it gains enough popularity, that story hits the homepage. Propeller.com was created out of an experiment by AOL subsidiary Netscape.
The Propeller.com project was headed by Weblogs Inc. co-founder Jason Calacanis. After AOL bought out Weblogs, Calacanis started to head up Propeller.com. One of the reasons why Propeller.com did not take off is because of its terrible design.
Calacanis and Digg co-founder Kevin Rose had beef with each other after the creation of Propeller.com too. Supposedly Calacanis paid some of Digg’s top users to join Propeller and become just as influential on that service as well. But the two ended their quarrels after they met on a podcast show.