When comparing jZip vs Greenshot (for Windows), the Slant community recommends jZip for most people. In the question“What are the best power user tools for Windows?” jZip is ranked 4th while Greenshot (for Windows) is ranked 10th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Totally free
Pro Sleek interface
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.
Cons
Con Default installation options include adware
You can avoid this if you select your options carefully at installation time
Con Avast! Antivirus automatically deletes the installer because of the optional adware installer included in it
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