TkGS is a project to replace XLEL to improve Tk's performance and cross-platform (or "device-independent", more properly) "maintainability". These enhancements might open up such new possibilities as a framebuffer-targeted Tk, themes support, graphical refinements including alpha transparency, ...

See Also

TkGS: the Tk Graphics System , 2000
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Another interesting aspect of TkGS that has been discussed is that it may make printing of graphical widgets easier.

What is the status of TkGS -- it looks like a wonderful idea, but I'm wondering if it is stuck... Nothing seems to have happened for a long time...

AK: AFAIK the only person working on TkGS is FB and he is constrained by real-life. I believe that he would be glad to have volunteers.