When comparing Monosnap vs Greenshot (for Windows), 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 Monosnap is ranked 13th. 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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Pro Easy drag and drop saving and uploading
Pro Annotation tools for both screenshots and during video recording
Pro Screenshots and Screencasts in the same app
Nice to have one less app running all the time.
It costs nothing.
Pro Able to upload directly after recording or capturing
Very convenient especially when doing stuff like writing documentation or blog where you can just paste the hotlink directly.
Pro Free and open source
Greenshot is licensed under GPL with source code available on BitBucket.
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 Freezes screen when you capture
When you enter a capture mode, the screen content is preserved as it was when you started capturing.
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 Can be quickly invoked with the print screen button
Pressing the print screen button will allow you to select the captured area.
Pro Classic UI design makes it easy to use.
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