Releases on June 27th, 2021 and before

github
ossrs/srs on GitHub v4.0.136
dockerhub
hotio/prowlarr on Docker Hub nightly-e8a45a0 nightly-0.1.0.555 nightly-e8a45a0-365-linux-arm64 nightly-e8a45a0-365-linux-arm-v7 nightly-e8a45a0-365-linux-amd64
dockerhub
hotio/prowlarr on Docker Hub pr-2658cc7 pr-binsearch-0.1.0.548 pr-binsearch pr-2658cc7-364-linux-arm64 pr-2658cc7-364-linux-amd64 pr-2658cc7-364-linux-arm-v7
github
linuxserver/docker-prowlarr on GitHub nightly-0.1.0.554-ls53
dockerhub
linuxserver/prowlarr on Docker Hub nightly-version-0.1.0.554 nightly-0.1.0.554-ls53 arm64v8-nightly-version-0.1.0.554 arm32v7-nightly-version-0.1.0.554 amd64-nightly-version-0.1.0.554 arm64v8-nightly-0.1.0.554-ls53
dockerhub
linuxserver/prowlarr on Docker Hub arm32v7-nightly-0.1.0.554-ls53
dockerhub
linuxserver/prowlarr on Docker Hub amd64-nightly-0.1.0.554-ls53
Maybe you can find something interesting in this list