Trailblazer is a high-level Architecture libraries for the Ruby web application (not only for Rails). If you are no familiar with it yet - take a 20 minutes walk through guide...
I want to cover once again those places where our team had issues or misunderstanding. Trailblazer documentation got a lot of improvements recently and keep getting more and more care. Some points from this list are covered by the docs, but in practice not everything was smooth.
patchbay.pub brillian and simple implementation of webhook, queue and anything else you name it :)
Tawk.to free live chat service
ImprovMX -create free email aliases for your domain name. Catch-all addresses, redirect to a webhook and send from it.
Skaffold tool that facilitates continuous development for Kubernetes-native applications. Continuously deploys to your local or remote Kubernetes cluster.
DoItLive is a tool for live presentations in the terminal. It reads a file of shell commands and replays the commands in a fake terminal session as you type random characters.