The MPS GC is a commercial quality garbage collector that runs on Windows, FreeBSD, Linux and Mac OS X in both 32 and 64 bit configurations.<p>It has a long history behind it going back to the Harlequin Lisp company in the 1990s.<p>This release brings a modernization of the documentation from old formats and a lot of newly written material:<p><a href="http://www.ravenbrook.com/project/mps/version/1.111/manual/html/" rel="nofollow">http://www.ravenbrook.com/project/mps/version/1.111/manual/h...</a><p>(For those who are interested in it for open source work, they're happy to talk about the licensing. They've been very generous with us for <a href="http://opendylan.org/" rel="nofollow">http://opendylan.org/</a> for example.)