If I recall correctly Marco Arment started Instapaper all by himself and kept working on it all by himself until it was not feasible anymore, and that's when he

If I recall correctly Marco Arment started Instapaper all by himself and kept working on it all by himself until it was not feasible anymore, and that's when he sold it. I think the solo-programmer startups are usually something among these kind of projects: - a webapp for simple or largely automated service - smartphone/tablet app - smartphone/tablet game ...