Microsoft Visual Programming Language - Microsoft VPL is an application development environment designed on a graphical dataflow-based...
FINAL CUT - Library for creating terminal applications with text-based widgets
Slang - Slang is a powerful visual programming language using a newly developed stream-based paradigm.
termbox - Termbox is a library that helps making terminal-based pseudo-GUIs.
AppArchitect - AppArchitect is a platform for creating beautiful Mobile Apps.
Visual Logic - Learning-focused, visual programming tool for Windows.