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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 logo 2.svg Inkscape Vector graphics program, Open source, similar to Adobe Illustrator or Corel Draw All
Wilber-huge-alpha.png 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
Exquisite-gimp2 0.png 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 logo small.png 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 Vorbis[edit]

Vorbis is a lossy audio codec.

  • Audacity can export projects in Ogg Vorbis format.

Ogg Theora[edit]

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.