Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.

EaseCentral - EaseCentral takes the headaches out of administration so you can focus on benefits.

Mailman 3 - Dedicated Mailman 3 installation. Unlimited lists/configuration. Free subdomain at mailman3.com. Dedicated support for list admins.

PlanSource - PlanSource is a web-based human resources and benefits administration solution servicing small and medium-sized businesses.

MailChimp - MailChimp is the best way to design, send, and share email newsletters.

Maxwell Health - Maxwell Health is an operating system for employee benefits that simplifies benefits, reduces costs, and improves employee health.