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I'm working on an auto-kerning tool. It's free and open source. If you're interested in taking a look, I'd love to hear your feedback.
As a demonstration, I've used Autokern to re-kern two popular open source fonts: League Gothic and Linden Hill (both from the League of Type). Here are direct links to before-and-after comparisons:
I took the fonts' original kerning as a point of departure when configuring Autokern.