TestRail - TestRail provides comprehensive test case management for software testing. Organize your testing, boost productivity, get real-time insights, and track progress toward milestones. Integrates with leading issue tracking and test automation tools.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
TestLink - Test & requirements management
Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.
Qase - Test case management software for QA and development teams that helps you make your product better.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES