Tool: Doing screenshots of web pages

How often have you found yourselves wanting to get a screenshot of some web page. You are writing a report, or doing some documentation, and want to get a screen shot of some web page. What can you use ? There are tools available, but many of them need to be purchased, and others put some watermark on the images. Well, here is a tool that can do the work (link to site).
From the site:

WebKut is an AIR application that allows you to capture web pages, or parts of them in a very simple way. It provides you 3 capture options: the entire page, the current view, or only a selection.
Limitations
On Microsoft Windows, PDF document and some Flash animations in web pages will be replaced by blank spaces.
The maximum dimension for an image is 2880 pixels