Kinchan -"Composable browser automation with Ruby."
Wifi deauthentication attacks and home security - Don't like Ring surveillance devices? Knock them off their networks. This is likely illegal but I'd love to see this sort of thing catch on. I can imagine a standalone battery-powered "Ring killer" that could be tossed in the bushes to do it's work. Wipe your fingerprints off first.
Stroom - "Stroom is a data processing, storage and analysis platform. It is scalable - just add more CPUs / servers for greater throughput. It is suitable for processing high volume data such as system logs, to provide valuable insights into IT performance and usage."
faasd - "aasd is a Golang supervisor that bundles OpenFaaS for use with containerd instead of a container orchestrator like Kubernetes or Docker Swarm."
Ruby 2.7 - Comprehensive changelog with links and code examples.