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

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

PeopleKeep - PeopleKeep has created a new way to offer benefits called personalized benefits.

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

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

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