Releases on May 4th, 2021 and before

dockerhub
hotio/readarr on Docker Hub pr-8bf29ad-300-linux-amd64 pr-8bf29ad-300-linux-arm64 pr-8bf29ad-300-linux-arm-v7
github
linuxserver/docker-jellyfin on GitHub nightly-20210504.69-unstable-ls470
dockerhub
linuxserver/jellyfin on Docker Hub nightly-version-20210504.69-unstable nightly-20210504.69-unstable-ls470 arm64v8-nightly-version-20210504.69-unstable arm32v7-nightly-version-20210504.69-unstable amd64-nightly-version-20210504.69-unstable arm64v8-nightly-20210504.69-unstable-ls470
github
ccxt/ccxt on GitHub 1.49.44
dockerhub
storjlabs/storagenode on Docker Hub d2033c2f5-go1.15.7 d2033c2f5-go1.15.7-arm64v8 d2033c2f5-go1.15.7-arm32v6 d2033c2f5-go1.15.7-amd64
Maybe you can find something interesting in this list