BuddyPress.org

@Hans

I’ve installed s2member on my site specifically because it CAN restrict access to both paid memberships AND free accounts. You can restrict access to posts, pages, tags, categories, single pages and uri’s. You can also have lots of fun with advanced conditionals and display different content to different membership levels, including the free level. For more info, check out this readme: http://www.primothemes.com/readme/914/

Here’s my membership options page to give you an idea of how I’ve set it up with free/paid plans: http://rspace.org/membership/