Not all software is free, and not all of it should be. Unless you are the type who can break out your C and Python manuals with ease, the time may come where you have an idea for a great application, and you're going to need someone else to do it. Why not leverage others who have the same need, and combine to provide a bounty, by which, if your solution is delivered to satisfaction, the developer or developers can reap the rewards directly from the end-users who will benefit from their product?
As a visible, active, FriendFeed user, I grew jealous by the success WordPress bloggers were having with Glenn Saven's nifty plug-in to show if items had received comments or "likes" from the popular social lifestreaming service. He had single-handedly developed a tool to unify conversations from disparate sources in an elegant way. But, for me, a long-time Blogger user, I was basically faced with a rock and a hard place. Migrate to WordPress, or keep my conversations separate.