Trace (Travaux et recherches dans les amériques du centre), a humanities journal focused on Mexico and Central America, converted to OA. The journal has been published under that title since 1985 by the Centre d'Études Mexicaines et Centraméricaines. The journal publishes in Spanish. The new OA site is hosted by Revues.org. Back issues to 2007 are currently available.
Humanitaire, a journal on humanitarian issues, converted to delayed OA with a three-month delay. The journal has been published since 2000 by Médecins du Monde. The journal publishes in French. The new site is hosted by Revues.org. Back issues to 2008 are currently available on Revues.org; previous issues are available OA from the publisher.
The open access movement:
Putting peer-reviewed scientific and scholarly literature
on the internet. Making it available free of charge and
free of most copyright and licensing restrictions.
Removing the barriers to serious research.
I recommend the OA tracking project (OATP) as the best way to stay on top of new OA developments. You can read the OATP feed on a blog-like web page or subscribe to it by RSS, email, or Twitter. You can also help build the feed by tagging new developments you encounter.