Xactly - Xactly is a cloud-based, incentive compensation solution for employee and sales performance management.
Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.
Performio - Sales Commission & Incentive Compensation Software
Mailman 3 - Dedicated Mailman 3 installation. Unlimited lists/configuration. Free subdomain at mailman3.com. Dedicated support for list admins.
Varicent - Varicent is a software that delivers services to users in sales performance management and incentive compensation plans.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.