Poker Copilot (http://pokercopilot.com/ http://pokercopilot.com/ - a hand history database/HUD for online poker) is one example, and actually a good example of

Poker Copilot (http://pokercopilot.com/ http://pokercopilot.com/ - a hand history database/HUD for online poker) is one example, and actually a good example of a business approach that many people here would doubtless love to follow (one guy, making a reasonable salary off of a medium-high-priced niche product, with no delusions of future massive growth). Steve McLeod knew that he'd never be able to compete with Pokertracker on Windows (it doesn't run on OS X), so he decided to focus 100% on the OS X side of it and add features as he was able, and I think that was an excellent decision. The product is quite good there and doesn't feel like an afterthought like many OS X products. It's a small market, but he's pretty much the only player in town, so...