[robrtsql]

I think they meant this web framework: https://amberframework.org/

There are two pretty big web frameworks in the Crystal world right now, one is Kemal which strives to be the Sinatra or Flask of the Crystal world (lightweight, supporting plugins), and the other is Crystal which is trying to be the Ruby on Rails or Django of the Crystal world (full-featured, opinionated).

[blacksmoke16]

There are also other options: https://github.com/veelenga/awesome-crystal#web-frameworks.

https://athenaframework.org is pretty unique. It's one of the more flexible frameworks IMO. It was inspired by Symfony and Spring, so takes a bit of a different approach as most other frameworks come from a more Ruby background.

[mfkp]

The other main one is https://luckyframework.org/ (also going for more of a full-featured Rails type framework)