MapWindow is has posted a message over on LinkedIn looking for testers and programmers. The text of the message, posted by Paul Meems, is:
Any GIS experts available with some free time?
Here at MapWindow GIS (www.mapwindow.org) we’re looking for people who are willing the use MapWindow (it’s Open Source, so it’s free to use) and share their experiences. We also have our own LinkedIn group: http://www.linkedin.com/e/gis/122945/37A6504A848A
A follow-up answer to one of my LinkedIn contacts clarified that they are looking for testers and programmers. So, if you’re interested in helping out an open-source project, here’s your chance. Also, you may want to give LinkedIn a spin.