Perhaps this sounds strange, but even though I’m a very happy BBEdit user I’ve recently purchased TextMate and skEdit. Why? Because competition is good. Because having a choice of development tools is good. And because letting these developers know that there is a market for good code editing tools for the Mac is good.
I try to support all software that I use and like one way or another. With some applications, this stops at purchasing the software license or making a donation but with others (generally those that I use the most), I try to get involved with beta testing and helping the developers continue to create a really top notch product. As a developer myself, I know that this kind of involvement from active beta testers and other developers is pure gold.
Want to help your favorite platform/product/idea succeed? Get involved and see what you can do to help.