Buddy
CI/CD and DevOps automation with visual pipelines
Codefresh
Container-based CI and GitOps delivery, now part of Octopus Deploy
AWS CodeBuild
Managed build and test service on AWS
Google Cloud Build
Serverless CI/CD platform on Google Cloud
Zuul
Project gating CI system with cross-project testing
Buildbot
Python-based framework for build, test and release automation