This question already has an answer here:
Which of the numerous WMD editors are used on Stack Overflow?
When I Google SO and WMD Editor there are several results linking to several different forks. What I've found so far are:
https://github.com/derobins/wmd: Appears to not have been updated in 3 years, so guessing no.
http://code.google.com/p/wmd/: Same as #1
http://code.google.com/p/pagedown/: Was recently updated a few days ago
https://github.com/ChiperSoft/wmd/: Hasn't been updated for a few months
https://github.com/bumpux/mmwords: Updated recently, but nothing related to WMD
Side note, most of the questions related to this topic, on MSO, date back to 2008-2010.
Some clarification would be great.