Writing in his bog, Neary said he has had a gutsful of the abusive behaviour in the GIMP community.
"I've been getting overly heated on both these issues, and have been trying to keep things moving in the right direction, but I realised yesterday that in both cases my intervention has been counter-productive," he said.
He said that he was getting so hot under the collar he was not looking clearly at the issues any more, and others have ideas which will work better than his.
Neary said he hadn't written any code for the GIMP in a long time anyway, and the project has ceased being fun.
He has pulled out of all the GIMP mailing lists, and bolsh@gimp.org no longer exists. He will also remove himself from the list of people who handle GIMP donations as soon as possible.