What CI/CD tools do you know and have used?

I have used several popular CI/CD tools, including:

• Jenkins — a flexible and extensible automation server that allows building complex pipelines.
• GitLab CI/CD — an integrated solution with GitLab, convenient for projects with GitLab repositories.
• GitHub Actions — enables creating workflows directly in GitHub, suitable for open-source and internal projects.
• CircleCI — a cloud service with simple configuration and good integration with Docker.
• TeamCity — a powerful tool from JetBrains supporting multiple languages and platforms.

In projects, I configured automatic test runs, artifact building, deployment to test and production environments, as well as integration with monitoring and notification systems.