Shoes is the best little GUI toolkit for Ruby. This gem is currently a placeholder until we properly gemfiy Shoes.

Ruby/GTK2 is a Ruby binding of GTK+-2.x.

qtbindings provides ruby bindings to QT4.x. It is derived from the kdebindings project.

FXRuby is the Ruby binding to the FOX GUI toolkit.

Glimmer is a Ruby DSL Framework for Ruby GUI and More, consisting of a DSL Engine and an Observable / Observer / Data-Binding Library (including Observable Model, Observable Array, and Observable Hash). Used in Glimmer DSL for SWT (JRuby Desktop Development GUI Framework), Glimmer DSL for Opal (Pure Ruby Web GUI and Auto-Webifier of Desktop Apps), Glimmer DSL for LibUI (Prerequisite-Free Ruby Desktop Development GUI Library), Glimmer DSL for Tk (Ruby Tk Desktop Development GUI Library), Glimmer DSL for GTK (Ruby-GNOME Desktop Development GUI Library), Glimmer DSL for FX (FOX Toolkit Ruby Desktop Development GUI Library), Glimmer DSL for Swing (JRuby Swing Desktop Development GUI Library), Glimmer DSL for JFX (JRuby JavaFX Desktop Development GUI Library), Glimmer DSL for XML (& HTML), and Glimmer DSL for CSS.

Glimmer DSL for LibUI (Prerequisite-Free Ruby Desktop Development GUI Library) - Winner of Fukuoka Ruby Award Competition 2022 Special Award - No need to pre-install any prerequisites. Just install the gem and have platform-independent native GUI that just works! Glimmer DSL for LibUI aims to provide declarative DSL syntax that visually maps to GUI control hierarchy, convention over configuration via smart defaults, automation of low-level details, requiring the least amount of syntax possible to build GUI, bidirectional data-binding, and custom keyword support.

The nifty Ruby gui toolkit. An easy to use gui toolkit built with scripting in mind.

Ruby bindings to libui

Glimmer DSL for SWT (JRuby Desktop Development GUI Framework) is a native-GUI cross-platform desktop development library written in JRuby, an OS-threaded faster JVM version of Ruby. It includes SWT 4.25 (released 31 Aug 2022). Glimmer's main innovation is a declarative Ruby DSL that enables productive and efficient authoring of desktop application user-interfaces by relying on the robust Eclipse SWT library. Glimmer additionally innovates by having built-in data-binding support, which greatly facilitates synchronizing the GUI with domain models, thus achieving true decoupling of object oriented components and enabling developers to solve business problems (test-first) without worrying about GUI concerns, or alternatively drive development GUI-first, and then write clean business models (test-first) afterwards. Not only does Glimmer provide a large set of GUI widgets, but it also supports drawing Canvas Graphics like Shapes and Animations. To get started quickly, Glimmer offers scaffolding options for Apps, Gems, and Custom Widgets. Glimmer also includes native-executable packaging support, sorely lacking in other libraries, thus enabling the delivery of desktop apps written in Ruby as truly native DMG/PKG/APP files on the Mac, MSI/EXE files on Windows, and DEB/RPM files on Linux. Glimmer was the first Ruby gem to bring SWT (Standard Widget Toolkit) to Ruby, thanks to creator Andy Maleh, EclipseCon/EclipseWorld/RubyConf speaker.

wxRuby allows the creation of graphical user interface (GUI) applications via the wxWidgets library. wxRuby provides native-style GUI windows, dialogs and controls on platforms including Windows, OS X and Linux.

Glimmer DSL for Tk (Ruby Tk Desktop Development GUI Library) - Ruby DSL for Tcl/Tk with bidirectional/unidirectional data-binding support.

Ruby/GTK3 is a Ruby binding of GTK+-3.x.

Comfortably talk with Tcl/Tk using FFI.