https://andymaleh.blogspot.com/2020/09/glimmer-has-been-one-point-ohed.html

Glimmer is finally 1.0.0. This marks a big milestone since Glimmer has outgrown its single-library roots and has become an assortment of Ruby gems that work together, such as Glimmer DSL for SWT (JRuby Desktop Development GUI Library), Glimmer DSL for Tk (Ruby Desktop Development GUI Library), Glimmer DSL for Opal (Web GUI Adapter for Desktop Apps), Glimmer DSL for XML (& HTML), and Glimmer DSL for CSS.