Description: GroupServer is an open source platform for building online communities and mailing lists. It allows groups to have discussions, share files, post news, and manage events.
Type: software
Pricing: Open Source
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