Releases on May 15th, 2021 and before

github
angband/angband on GitHub 4.2.2-102-g5c7c7b14 4.2.2-101-g93b234de
dockerhub
hotio/lidarr on Docker Hub nightly-68e5368 nightly-1.0.0.2217 nightly-68e5368-558-linux-arm64 nightly-68e5368-558-linux-arm-v7 nightly-68e5368-558-linux-amd64
github
apache/airflow on GitHub helm-chart/1.0.0rc2
dockerhub
hotio/sonarr on Docker Hub nightly-c988685 nightly-3.0.6.1233
dockerhub
hotio/lidarr on Docker Hub pr-dd52d20 pr-sonarr-pull-91fe47ef-1.0.0.2216 nightly-170a4fe pr-sonarr-pull-91fe47ef nightly-1.0.0.2214
dockerhub
hotio/sonarr on Docker Hub nightly-c988685-431-linux-arm64 nightly-c988685-431-linux-arm-v7
dockerhub
hotio/readarr on Docker Hub pr-893f1be-324-linux-amd64 pr-893f1be-324-linux-arm64
dockerhub
hotio/sonarr on Docker Hub nightly-c988685-431-linux-amd64
dockerhub
hotio/readarr on Docker Hub pr-893f1be-324-linux-arm-v7
dockerhub
hotio/lidarr on Docker Hub pr-dd52d20-557-linux-arm-v7 pr-dd52d20-557-linux-arm64 pr-dd52d20-557-linux-amd64 nightly-170a4fe-556-linux-arm-v7
npm
fomantic-ui on Node.js NPM 2.8.8-beta.246
github
linuxserver/docker-sonarr on GitHub develop-3.0.6.1231-ls168
dockerhub
linuxserver/sonarr on Docker Hub develop-version-3.0.6.1231
Maybe you can find something interesting in this list