Description: Mailman is an open source mailing list management system. It helps manage email discussion and announcement lists, allowing users to subscribe and unsubscribe, and helping admins moderate and post to the lists.
Type: software
Pricing: Free
Description: Wiki Answers is a community-powered question-and-answer website where questions are asked, answered, edited and organized by its community of users. The site allows anyone to ask or answer questions on any topic.
Type: software