Free Screen Capture Utilities
Moi only knows how many times I would have wished that I owned a copy of Snag-It , a screen capture tool. This is one of the most awesomest screen capture aid available in the market. It even supports the capturing of a multi-page screen shot. This tool is easy to use, has a bundle of exciting features and the interface is very sleek. I know that not everything is life is free; meaning to say some are infact free and here is a list of a free alternatives:
Cropper  is a screen capture application written in C# on the Microsoft .Net platform. It makes it fast and easy to grab parts of your screen. Use it to easily crop out sections of vector graphic files such as Fireworks without having to flatten the files or open in a new editor. Use it to easily capture parts of a web site, including text and images. Cropper can save the screen capture to the clipboard, have it sent directly to the printer, or automatically save it to disk as a BMP, PNG, or JPG file. The nice set of features in this app makes it my favorite free screen capture aid.
Tebo Screen  is a simple screen capture utility developed by Guy Thiebaut . It is another C# .Net application that has three buttons; Capture Screen: To capture the entire screen, Capture Area: holding down the left mouse button, users draw a rectangle specifying which part of the screen they wish to capture. On releasing the left mouse button, the user selects a file name and the area behind the drawn rectangle is captured to this file. Exit: obviously, to exit the application. I like the simplicity of the code and is an excellent source for beginners to understand how this is done programatically. BMP is the default image saving format, the code can be tweaked very easily to save the image in other formats like .jpg, .gif, etc.
ZScreen  is another C# .Net 3.5 utility for the same purpose. I am yet to try this and will post about this soon.
FireShot  is an add-on for the Firefox and IE browsers that can be used to capture entire or part of a web page. This comes with an editor that is handy to manipulate the screen capture. Screen shots can be saved in one of these formats: PNG, GIF, JPEG and BMP. Check here to download Firebox add-on and here to downloadIE add-on.