Download of CaptureScreen 3.0 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free program was originally created by Patrice Zwenger. We recommend checking the downloaded files with any free antivirus. The software belongs to Photo & Graphics Tools.
From the developer:
Right-click for contextual menu access. Move and size the window to the desired location, and select the "Capture" command for a region capture of the screen, or the "Full Screen" command for a full capture of the screen. Save the capture with the "Save" command; png format (by default) gives a perfect result. The "Clear" command erases the capture.
You may want to check out more software, such as Capture ScreenShot Pro, which might be related to CaptureScreen.