Kenny Kerr’s Window Clippings is a screen capture tool for those who are serious about their screenshots. Promising “the highest quality screenshots with the least amount of effort”, Window Clippings allows users to switch between window and rectangular selections, capture pop-ups, convert black and white, remove the background, include parent window or multiple windows, and crop automatically. It can also send the screenshot directly to OneNote or Paint.NET. An external add-in allows you to add a watermark on your screens. In its latest build (2.1.28), it is no longer freeware, but has trial x64 and x86 editions that are still worth checking out.