Releases on May 25th, 2020 and before

dockerhub
datadog/agent on Docker Hub 6.20.0-rc.7-jmx 6.20.0-rc.7
dockerhub
crazymax/diun on Docker Hub 3.0.0-beta.4
github
pnpm/pnpm on GitHub v5.0.0-rc.3
github
linuxserver/docker-qbittorrent on GitHub 14.2.5.99202004250119-7015-2c65b79ubuntu18.04.1-ls79
dockerhub
bitnami/mysql on Docker Hub 8.0.20-debian-10-r27
dockerhub
parity/polkadot on Docker Hub master-0.7.34-dev-9d00ce4-fc7e2620
dockerhub
linuxserver/qbittorrent on Docker Hub 14.2.5.99202004250119-7015-2c65b79ubuntu18.04.1-ls79 arm64v8-14.2.5.99202004250119-7015-2c65b79ubuntu18.04.1-ls79 arm32v7-14.2.5.99202004250119-7015-2c65b79ubuntu18.04.1-ls79 amd64-14.2.5.99202004250119-7015-2c65b79ubuntu18.04.1-ls79
github
openshift/service-catalog on GitHub atomic-enterprise-service-catalog-4.5.0-202005252317
dockerhub
parity/polkadot on Docker Hub master-0.7.34-dev-4c4dcd2-d70b8009
github
gnachman/iTerm2 on GitHub v20200526-nightly
dockerhub
carldebilly/zigbee2mqttassistant on Docker Hub 0.3.170-linux-arm64 0.3.170-373-linux-arm64 0.3.170-linux-arm32 0.3.170-373-linux-arm32
Maybe you can find something interesting in this list