Free stock images resources

Most of us develop websites or applications and we do need images to make them more attractive.

I do not want to invest too much money in something that I give away for free so when I develop something I think about using some free images sources.

Free images are very important for the development of internet and I want us to share their resources when it comes about downloading images for usage.

I like a lot sxc.hu, one of the biggest databases with images.

You ?