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: Puppet is an open source configuration management and automation tool. It helps system administrators manage IT infrastructure by automating repetitive tasks, enforcing desired state configuration, and increasing efficiency.
Type: software
Pricing: Paid