Dagger is a portable devkit for CI/CD pipelines, developed by the creators of Docker. It enables DevOps engineers to build and run powerful pipelines anywhere by providing a composable, reusable software components system. Powered by Buildkit, Dagger aims to solve the fragmentation problem in DevOps by unifying development and CI environments, facilitating local testing and debugging, and avoiding CI lock-in. Dagger runs on any Docker-compatible runtime, solving dev/CI drift and CI lock-in, and it's in early stages of development with active community participation encouraged.