When comparing Greenshot (for Windows) vs SnapDraw, the Slant community recommends Greenshot (for Windows) for most people. In the question“What are the best screen capture tools for Windows?” Greenshot (for Windows) is ranked 2nd while SnapDraw is ranked 19th. The most important reason people chose Greenshot (for Windows) is:
Greenshot is licensed under GPL with source code available on [BitBucket](https://bitbucket.org/greenshot/greenshot).
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Pros
Pro Free and open source
Greenshot is licensed under GPL with source code available on BitBucket.
Pro Freezes screen when you capture
When you enter a capture mode, the screen content is preserved as it was when you started capturing.
Pro Allows annotating, highlighting and obfuscating screenshots
Pro Can capture an entire webpage
Instead of just capturing the visible portion of the page, this tool can capture all of the page in one image by scrolling through the page, taking images at set points and then stitching the images together.
Pro Can be quickly invoked with the print screen button
Pressing the print screen button will allow you to select the captured area.
Pro Selecting custom rectangle is the default
Easy to use selection tool with a magnifier to select only the part of the screen that you need.
Pro Classic UI design makes it easy to use.
Pro Annotations
Lot's of choice in annotations, balloons and auto numbering.
Pro Projects
Can save projects so you can edit the objects like text, arrows and shapes later.
Cons
Con Scrolling window capture is only working in Internet Explorer
Con This version only works on Windows, not Linux nor Mac
However, the same author now has a separate version of Greenshot for iOS, which is available (for a small fee) in the Mac App Store at https://itunes.apple.com/us/app/greenshot/id1103915944
Con Interface
The user interface is a bit convoluted, and takes a while to get used to.