Docker Hub

BuildKit

moby/buildkit

Popular

Concurrent, cache-efficient image builder behind docker build and buildx, with multi-platform support.

Harbor

goharbor/harbor

CNCF-graduated self-hosted registry with RBAC, vulnerability scanning, replication and image signing.

Buildah

podman-container-tools/buildah

Daemonless tool for building OCI images from Dockerfiles or scripts; pairs with Podman in rootless CI.

Cloud Native Buildpacks

buildpacks/pack

Turns source code into reproducible OCI images without Dockerfiles; used by Heroku, Google Cloud and Paketo.

ko

ko-build/ko

Builds and publishes Go applications as minimal container images without a Dockerfile or Docker daemon.

Depot

depot.dev

Rising

Hosted remote container builds with persistent layer cache, plus faster GitHub Actions runners.

Dive

wagoodman/dive

Terminal UI for exploring image layers and spotting wasted space to shrink container images.

Zot

project-zot/zot

Lightweight OCI-native registry that runs as a single binary; CNCF sandbox project.