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ImageMagick?*A* is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 100) including DPX, EXR, GIF, JPEG, JPEG-2000, PDF, PhotoCD, PNG, Postscript, SVG, and TIFF. Use ImageMagick to resize, flip, mirror, rotate, distort,... Platforms: *nix

PascalMagick is a translation of the c header files for both MagickWand and Magick Core. ImageMagick is a free software suite developed to create, edit, and compose bitmap images. Images can be cropped, colors can be changed, various effects can be applied, images can be rotated and combined,... Platforms: *nix

Vector graphics software based on graphs. With KnotsBag you can design knotwork (or other drawings) very easily and very quickly by just clicking on points. You just have to create a graph. For that you create points with the mouse and you link the points with one of the four different links... Platforms: Mac

Skencil is a Free Software interactive vector drawing appliction. Known to run on GNU/Linux and other UNIX-compatible systems, it is a flexible and powerful tool for illustrations, diagrams and other purposes. A somewhat unique (for a drawing program) feature of Skencil is that it is implemented... Platforms: *nix, C/C++, BSD