argo-cd
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes.
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Concourse
Concourse is a CI system composed of simple tools and ideas. It can express entire pipelines, integrating with arbitrary resources, or it can be used to execute one-off tasks, either locally or in another CI system.
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Drone
Drone is a Continuous Integration platform built on Docker, written in Go
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Semaphore
Semaphore is a hosted continuous integration and deployment service for open source and private projects. Its cloud solution helps developers find bugs before they reach users and deliver new features faster.
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