Although not an entirely Linux geek post, this web-based service provides a nifty tool for web application developers who use only one platform for their development. Testing how your web application looks like in major browsers is a tedious job and may require that you purchase new computers (Mac) or new licenses (Windows). Browsershots provides you with a screenshot of your web-site using popular browsers on Windows, Mac and Linux such as Firefox, Safari and Internet Explorer, among others. It also includes other not-so-popular browsers on Linux, some of which I have not really touched. :)
Several issues I found so far are (1) the service seems to be slow to display the screenshots. It gives an impression that this is being done manually and not automated. hehehe; (2) other browsers such as Camino and OmniWeb are not included; and (3) device specific browsers such as Wii, mobile phones, internetTV, etc. are not supported either. That being said, it is better than nothing. :)