OpenGCD provides a portable implementation of the Grand Central Dispatch API. It combines several components:
These components together provide the complete functionality needed to port programs that use GCD to other platforms.
Click the link below to go to the download page.
There is a mailing list named 'opengcd-support' that provides a general forum for questions about OpenGCD. If you want to get notified when a new version is released, consider subscribing to the 'opengcd-announce' mailing list.
There is also an IRC channel named '##opengcd' on irc.freenode.net where developers hang out. If you don't have an IRC client, click here to visit the IRC channel in your web browser.