When it comes to screen capture there are many freeware tool including the default snipping tool available in Windows 7 and Vista. iScreen Capture is another portable and free tool for Windows which can capture screenshots and then save them on to your PC. There is a also a bundled image viewer and you can capture screenshots for complete screen or even the window.
The UI is pretty good and you can minimize the tool to system tray. Although the author says, the app works Only in Windows 7 32 bit versions, we tested in on 64 bit Windows 7 and found no issues while capturing screenshots.
If you are looking for a simple and lightweight screen capture tool, then this tool is handy.
