Packer is described as 'open source tool for creating identical machine images for multiple platforms from a single source configuration. Packer is lightweight, runs on every major operating system, and is highly performant, creating machine images for multiple platforms in parallel' and is an app in the Network & Admin category. There are four alternatives to Packer for a variety of platforms, including Mac, Windows, Linux, BSD and FreeBSD. The best alternative is Docker, which is both free and Open Source. Other great apps like Packer are Vagrant (Free, Open Source), Crane (Free, Open Source) and Singularity (Free, Open Source).
Crane is a container image tool that includes building local Docker images; connecting to DockerHub; listing local and remote container images; pushing local images to the DockerHub registry, and importing remote container images into an MLOps platform cluster.