I just happened to come across the Alternative Libraries database that catalogues the materials in the libraries of four social change organizations: 2110 Centre, QPIRG Concordia, QPIRG McGill and the Union for Gender Empowerment. From the website:
We each have a unique library with a plethora of rare, independent and hard-to-find, and sometimes out of print, local & international publications books about justice, identity, diaspora, diy, politics & political thought, economics, community, biography, sexuality, sex & gender, and much more. In our database, we have combined the titles and publication information for our four libraries.
The catalogue contains books, zines, DVDs, videocassettes, reports and kits. It’s even possible to rate and review the items in the catalogue.