Free Software Needs Free Tools
I finally finished an article I've had in one form or another for years about on the use of proprietary tools in the creation of free software. From BitKeeper to SourceForge to Google Code to GitHub, non-free tools and services have played an important role in free software development over the past decade and, I argue, continue to create a number of important, if sometimes subtle, problems for our community.
The article was published in the Spring 2010 FSF Bulletin which was mailed to all FSF associate members. I've also posted the article on my website and in PDF form as well.