Kemal: Fast, simple web framework for Crystal
kemalcr.com
kemalcr.com
You can check this for a realtime web application with Kemal + React using WebSockets https://github.com/f/kemal-react-chat
[1] https://github.com/Codcore/amethyst https://github.com/dhruvrajvanshi/Moonshine https://github.com/werner/amatista (all above repos' latest commits are 2-4 months back)
P.S: It's not just for Rubyists.
Crystal (Kemal) CPU 1.85 Memory 11.2 MB
Node.js (ws) CPU 38.95 Memory 906.3 MB
impressive
https://salt.bountysource.com/teams/crystal-lang
Matz donated as well.