Releases on March 10th, 2021 and before

dockerhub
hotio/radarr on Docker Hub nightly-2f86813 nightly-3.1.0.4724 musl-ea9c3c0 musl-3.1.0.4724
dockerhub
hotio/radarr on Docker Hub musl-ea9c3c0-1278-linux-arm64 musl-ea9c3c0-1278-linux-amd64 nightly-2f86813-1277-linux-amd64 nightly-2f86813-1277-linux-arm64 nightly-2f86813-1277-linux-arm-v7
dockerhub
calico/node on Docker Hub v3.19.0-0.dev-52-g14dffe16dba2
dockerhub
calico/node on Docker Hub v3.19.0-0.dev-52-g14dffe16dba2-ppc64le v3.19.0-0.dev-52-g14dffe16dba2-arm64 v3.19.0-0.dev-52-g14dffe16dba2-amd64
dockerhub
parity/polkadot on Docker Hub master-0.8.29-c0474d2c-6e167369
dockerhub
bitnami/postgresql on Docker Hub 9.6.21-debian-10-r29
github
linuxserver/docker-sonarr on GitHub develop-3.0.5.1157-ls143
dockerhub
linuxserver/sonarr on Docker Hub develop-version-3.0.5.1157 develop-3.0.5.1157-ls143 arm64v8-develop-version-3.0.5.1157 arm32v7-develop-version-3.0.5.1157 amd64-develop-version-3.0.5.1157 arm64v8-develop-3.0.5.1157-ls143 arm32v7-develop-3.0.5.1157-ls143 amd64-develop-3.0.5.1157-ls143
Maybe you can find something interesting in this list