Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes.
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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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ConfigCat is a feature flags as a service. It gives you a web based dashboard to manage your feature flags + SDKs to integrate those feature flags into your applications. ConfigCat enables you to use the same feature flags in your mobile apps, websites and server-side applications. It offers all features for free. You get an enterprise-ready SLA with the pricing plans.
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werf is CI/CD tool for building Docker images and delivering them to Kubernetes using a GitOps approach. It integrates with any existing CI systems including GitLab CI, GitHub Actions, etc.
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