Semaphore
Semaphore is an open source CI/CD platform
...Secrets management, environment promotion, and approvals enable robust delivery gates from pull request to production. The system integrates with popular VCS providers and chat tools, surfacing real-time status, logs, and insights so teams can diagnose failures quickly. With autoscaling workers and flexible resource types, Semaphore adapts to small projects and large monorepos alike, turning CI/CD into a reliable, low-friction part of everyday development.