SAI360 - GRC Platforms
Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.
Fastpath Assure - Fastpath Assure is a cloud GRC platform that integrates with various ERP systems
Mailman 3 - Dedicated Mailman 3 installation. Unlimited lists/configuration. Free subdomain at mailman3.com. Dedicated support for list admins.
AuditBoard - AuditBoard is a platform that offers compliance and audit management that allows auditors to analyze, manage, and report the business operations.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.