What are the best continuous delivery software?

As of my last update in October 2023, there are several popular and effective continuous delivery (CD) tools that organizations use to automate the deployment of applications. The best choice often depends on your specific needs, existing infrastructure, and team expertise. Here are some of the top continuous delivery software options:

1. **Jenkins**: An open-source automation server that supports building, deploying, and automating software development processes. It has a vast ecosystem of plugins and is highly customizable.

2. **GitLab CI/CD**: Integrated directly into GitLab, it provides a seamless experience for version control and CI/CD. It supports pipelines, environments, and monitoring.

3. **CircleCI**: A cloud-based CI/CD tool that offers fast builds and easy integration with various version control systems. It provides a user-friendly interface and supports Docker natively.

4. **Travis CI**: A cloud-based CI/CD service that integrates well with GitHub. It is easy to set up and is popular for open-source projects.

5. **Azure DevOps**: A suite of development tools from Microsoft that includes Azure Pipelines for CI/CD. It supports multiple languages and platforms and integrates well with other Azure services.

6. **AWS CodePipeline**: A fully managed continuous delivery service that automates the build, test, and release phases of your application. It integrates well with other AWS services.

7. **Spinnaker**: An open-source multi-cloud continuous delivery platform that helps you release software changes with high velocity and confidence. It is particularly strong in managing deployments across multiple cloud providers.

8. **Octopus Deploy**: A deployment automation tool that integrates with CI servers and provides a user-friendly interface for managing releases and deployments.

9. **TeamCity**: A powerful CI/CD server from JetBrains that offers a wide range of features, including build history, build chains, and integration with various tools.

10. **Bamboo**: A CI/CD server from Atlassian that integrates well with other Atlassian products like JIRA and Bitbucket. It provides a robust environment for building and deploying applications.

11. **GitHub Actions**: A feature of GitHub that allows you to automate workflows directly from your GitHub repository. It supports CI/CD and can be customized with various actions.

12. **Harness**: A modern software delivery platform that uses machine learning to automate the deployment process, making it easier to manage and monitor releases.

When choosing a continuous delivery tool, consider factors such as ease of use, integration capabilities, scalability, community support, and pricing. It's also beneficial to evaluate how well the tool fits into your existing development and deployment workflows.