https://www.classcentral.com/report/best-crystal-programming-courses/
Comprehensive security for Lucky framework
Wasmer Crystal
A Game Boy, Game Boy Color, and Game Boy Advance emulator in Crystal Lang
Simple and fast keyboard focused IDE written in Crystal and GTK.
UML model and code examples of GoF design patterns in Crystal
https://github.com/takaakit/design-pattern-examples-in-crystal
GoF design pattern examples in this project are developed using UML and Crystal. If you are interested in using UML in your Crystal development, the examples may be useful for you.
A refreshing collection of awesome Mint libraries, tools, and software
https://github.com/egajda/awesome-mint
A curated list of awesome things related to Mint. Inspired by Awesome Crystal, Awesome Vue and all the other Awesome Lists of the world.
Friends of Crystal
Organizations using Crystal in Production
Crystal-Ameba GitHub organization
Ameba and a couple of related repos are moved to it's own GitHub organization. Check it out:
A collection of awesome Lucky libraries, tools, frameworks and software
https://github.com/andrewmcodes/awesome-lucky
A categorized community-driven collection of awesome Lucky libraries, tools, resources.