S2Member is an easily configurable & highly extensible, yet free WordPress membership (The s2Member® Framework) plugin. It integrates with PayPal Website Payments Standard (also free). Through this, users can sell “Buy Now” or Membership access to their sites. They can also restrict access to WordPress Posts, Pages, Tags, Categories, URIs, BuddyPress/bbPress, and even portions of content within Posts, Pages, themes, plugins among others.… Read the rest