We’ve been putting some effort in recently to shift our major JVM-hosted MaxMSP projects to GitHub. Most of them started out hosted privately in CVS and built using Eclipse, and then migrated to hosting in Mercurial, with a different directory structure and a fair degree of pain in getting the various Ant scripts to work again. Moving everything to GitHub made sense, but that required another rearrangement of source directories and build paths, so it was obviously time to bite the bullet and use Maven to build everything instead. This decision has lowered the maintenance effort considerably.