Although Linux itself is based on many people programming, aside from the "major" programs such as media players, text editors, etc, there aren't that many "specific" programs. For example, on Windows, a Google search for almost any program turns up some website with a program a random person made.

On Ubuntu, however, it's sort of difficult for a newcomer ("newb") to start programming, which could be the reason for why there is not as much development going on as there could be.