Some of the projects I'm working on, in my spare time:

alertmanager-notifier is a notifier for alertmanager, written in python. It supports multiple notification channels and new ones can be easily added.

cioban is a docker swarm service for automatically updating your services to the latest image tag push

crypto-exporter is an exporter capable of connecting to multiple exchanges and getting account balances and exchange rates

csp is a basic Content Security Policy processor running in docker

grafana-email is a docker image that connects to Grafana and sends an e-mail with attached graphs

mariadb-backup is a docker image to backup a MySQL or MariaDB container

swarm-launcher is a docker image to allow the launch of container in docker swarm, with options normally unavailable to swarm mode

You can see the full list on GitLab, GitHub or Docker Hub.