iPhoto slows down my computer

Is there an alternate program to iPhoto that I can use to manage my digital image library? I used to use CompuPic Pro, which ran very nicely, but they don't make a Macintosh version anymore. I was really happy with how CompuPic ran on Windows machines as well. But I am super disappointed with iPhoto. It slows down my entire computer, and the program itself runs painfully slow. I have about 9000 images, which I really didn't think was that much. I can barely use my computer when iPhoto is running, it is sooooooo frustrating, I can't even enjoy my collection of images anymore. Please help!