Membership system written in PHP, includes registration form, login form.
Better membership software for WordPress.
(2015) Zenbership Membership Software: Achieve Membership Nirvana
Open source membership management system written in Symfony2
Membership management system that helps non-profit organizations running their projects, written in PHP / Symfony.
Admidio is a free open source user management system for websites of organizations and groups. The system has a flexible role model so that it’s possible to reflect the structure and permissions of your organization.
UNA | Community Management System
web based software system for manging membership based community