I'm happy to announce the release of an Ableton Link external for desktop Pd. The new external is patch compatible with the previously released iOS version. It is available from deken; just search for abl_link~.
Any feedback would be appreciated, especially about the accuracy of the external. The Ableton Link API expects latency information that is not readily available to externals on the desktop. For the initial release I basically just eyeballed it. It works well on my Mac, but results on other platforms may differ. I'm hoping to improve this in response to user feedback.
Many thanks to Matt Black, Ed Kelly, Chris Rice, and especially Antoine Rousseau for invaluable help and feedback!