Contributing to open-source DevOps projects is an excellent way to gain hands-on experience and connect with the global community.The best open-source DevOps projects to contribute to in 2025 include Kubernetes, Jenkins, Terraform, Prometheus & Grafana, and Ansible.Contributing to these projects helps in mastering crucial skills and finding real-world applications.Some common mistakes to avoid are not reading documentation, ignoring small contributions, and not communicating with the community.