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: Zendesk is a customer service software company that provides products to manage customer support interactions. Its flagship product, Zendesk Support, is a help desk ticketing system that allows companies to track, respond to, and resolve customer support tickets.
Type: software
Pricing: Paid