Try this one. It is from a guy who wrote it to be fast and simple. It's not the loaded stuff you may want, but it works. It's fast, but you do have to keep bibles in main memory. The beauty is that it is not only free, but you can make any bible compatible with it, by just making a folder with a name and formatting the .txt files the same way.
Go to the website, and along the links bar, look for PDA Bible and click it...
http://www.havenofbliss.com/welcome.html