Looking to learn more about open source? Check out this article by Jason Puckett:
Puckett, Jason. “Open Source Software and Librarian Values.” Georgia Library Quarterly 49, no. 3 (July 1, 2012). http://digitalcommons.kennesaw.edu/glq/vol49/iss3/9.
Jason is the one who taught me more about Zotero – one of my favorite open source tools!