Wikipedia
Greenshot
Greenshot is a free and open source screenshot program for Microsoft Windows. It is developed by Thomas Braun, Jens Klingen and Robin Krom and published under GNU General Public License. The development project is hosted by SourceForge.
Greenshot's feature set mainly targets project managers, testers and developers. It is used to create full or partial screenshots. The captured screenshot can be annotated and edited using the built-in image editor before exporting it either to an image file, email attachment, printer or clipboard.
By March 2012, Greenshot was available in 26 languages, most of the translations have been contributed by users. The recent version added Indonesian and Estonian language.