Trial version of Browserseal is available for download free of charge.
This version is limited to two browsers (Firefox and Internet Explorer) and one screenshot per session.
Full BrowserSeal and BrowserSeal.Robot versions have no limitations and come with standalone versions of the following browsers:
Firefox 3.0, Firefox 3.5, Firefox 4.0, Internet Explorer 6.00, Internet Explorer 7.00, Internet Explorer 8.00, Chrome, Opera 8, Opera 9, Opera 10, Opera 11, Safari 3, Safari 4, Safari 5, Safari 6 and Opera Mini 6.
Note that BrowserSeal requires Java Runtime Environment (JRE) which can be downloaded here in case it is not installed on your computer already.