Calamari - Calamari helps organizations, companies, and enterprises to manage their human resources in an easy and compliant way by delivering modern and easy-to-use time tracking and attendance management tools.
Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.
Ingentis org.manager - Organizational chart creation & publishing
Mailman 3 - Dedicated Mailman 3 installation. Unlimited lists/configuration. Free subdomain at mailman3.com. Dedicated support for list admins.
DreamTeam - Effectively manage all of your projects with DreamTeam, a comprehensive project management platform.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.