Graphical user interface builder – Programs (kb)

App Inventor for Android
AutoIt
Axure RP
C++

C++Builder
Qt Creator

Cocoa/OpenStep

Interface Builder

dBase
Ebase Xi
Embedded Wizard
FLTK

FLUID

GNUstep

Gorm

GEM

Resource construction set

GTK+

Glade Interface Designer
Stetic

GTK#

MonoDevelop

Intrinsics

Motif

LucidChart
Object Pascal

Delphi
Lazarus

OpenWindows
Pencil
Qt

Qt Creator

Scaleform
Tk (framework)

ActiveState Komodo (No longer[when?] has a GUI builder)

Ultimate++
VCL (Visual Component Library)

Delphi
C++Builder

Wavemaker
WeeScript Automation
Windows Presentation Foundation

Microsoft Expression Blend

nuBuilder
wxWidgets

wxGlade
wxFormBuilder
wxCrafter (see CodeLite)

XForms (toolkit)
Crank Storyboard Suite