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These are labeled five stars of image manipulation by the コモンズ・コミュニティ:

Name Features Formats Operat. Syst.
  Inkscape Vector graphics program, Open source, similar to Adobe Illustrator or Corel Draw All
  Gimp High quality open source image editing suite, similar to Photoshop Imports and exports a lot of file formats including but not limited to JPG, PNG and animated GIF's. Linux, Windows
  Gimpshop A version of GIMP, modified to be more familiar to users of Photoshop, and said to have a less steep learning curve PNG, JPG, GIF All
  Hugin For stitching of panorama images All
Blender For creation and editing of 3D images All



  • Jpegtran command line app that can perform a variety of lossless transformations on JPEG files;
  • Jpegcrop a Windows version with graphical interface.



  • gifsicle: A command line tool for making, manipulating, and optimizing animated gifs.


PNG形式は、画質の劣化が発生しないフォーマットであるため、SVG形式で有効ではないダイアグラムであっても、いかなる形式のダイアグラムに適しています。 Eventually, you can use OptiPNG, a command line tool, for optimising images.


SVG, or Scalable Vector Graphics, is an XML-based vector graphics format. It can be created and edited by hand as a text file, or edited through a specialized program.

If you use Adobe Illustrator, try to save as a "plain" SVG otherwise Adobe might put a lot of "junk" in your file. This can increase the file size unnecessarily and sometimes causes thumbnails to not render properly.

Ogg VorbisEdit

Vorbis is a lossy audio codec.

  • Audacity can export projects in Ogg Vorbis format.

Ogg TheoraEdit

Theora is a lossy video codec.

  • ffmpeg2theora is a command line application available for most operating systems, including Linux, Mac OS, and Windows.
  • Videolan Client is an opensource multimedia player also being capable to transcode files but having the advantage of supporting both a GUI as well as the command line; available for most operating systems including Windows, Unix and Mac OS.