Rails inspired:
PHP developers to write cakePHP,
JavaScript developers to write Railway.JS
and Python developers to write Django (I’m not sure about this one).
Why so many non-Ruby developers built Rails-like frameworks inspired in Ruby on Rails?
(I’m not very sure if some of the frameworks I mentioned above were written before Rails)
Django was released on Jul 2005; Ruby on Rails came out a year earlier.
You don’t mention Grails for Java; it’s based on Spring, Hibernate, and Groovy.
I don’t think there’s anything unique about Ruby or any homage going on. It says that developing CRUD-based web apps is a problem that’s common to lots of languages. It’s natural that someone would try to solve the problem using convention over coding in their favorite.