BinaryWolf

browsershots.org

Free service similar to browsercam. With browsershots, you get what you pay for which means sitting in a que for several hours before you can view your results. Not complaining about it; as a matter of fact I applaud their initiative:

This project is concerned with a favorite problem of web designers: websites look different in other browsers.

Testing a new site in many browsers can be quite time-consuming. Not everybody has a farm of legacy machines with older OSes and browsers.

There are online services that offer screenshots of websites in different browsers for considerable fees. For the hobbyist and for open source projects, these fees may be prohibitive.