GNU Mailman is a mailing list management software. Mailman project was started long time ago before the Millennium. Since its birth it has become the most intelligent tool for handling mailing lists ever. Huge number of companies with Fortune 500 members among them have been using Mailman for years. The new version Mailman 3 brings to us even better user experience and communication power.
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
Sympa - Sympa is an open source (GNU GPL) mailing list management (MLM) software.
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.