There are r3 alpha builds for PPC and x64 from rebolsource.net but they're from 2013. There are sometimes daily builds of renc which are uploaded to S3 includin

There are r3 alpha builds for PPC and x64 from rebolsource.net but they're from 2013. There are sometimes daily builds of renc which are uploaded to S3 including x64 OSX from Travis-ci.