Script-Fu
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Script-Fu is a scripting extension for the GIMP, a bitmap graphics editor. It used to be based on SIOD (Scheme in One Defun), but was switched to TinyScheme as of GIMP 2.4.
It is a horrible enviroment for scripters, lacking in documentation and usually provides cryptic error messages that force the user to debug on a best guess-basis, but it works.. Kind of.