Some successful Fourth Generation Language

1) General Use / Versatile
SQLWindows/Team Developer
Forté TOOL (transactional object-oriented language)
SheerPower4GL (Microsoft Windows Only)
PowerBuilder
WinDev
DataFlex
Visual DataFlex (Microsoft Windows Only)

2) Database query languages
FOCUS
NATURAL
Informix-4GL
Genero
Progress 4GL
SQL
SB+/SystemBuilder

3) Report generators
Quest
Report Builder
BuildProfessional
GEMBase
IDL-PV/WAVE
LINC
Metafont
NATURAL
Oracle Reports
PostScript
Progress 4GL Query/Results
RPG-II
Gauss

4) Data manipulation, analysis, and reporting languages
Clarion Programming Language
Ab Initio
ABAP
ADS/Online (plus transaction processing)
Aubit-4GL
Audit Command Language
CorVision
CoSort SortCL
Culprit
DASL
FOCUS
Genero
GraphTalk
Informix-4GL
LANSA
Maple
MAPPER (Unisys/Sperry) now part of BIS
MARK-IV (Sterling/Informatics) now VISION:BUILDER of CA
Mathematica
MATLAB
NATURAL
Nomad
PL/SQL
Progress 4GL
PROIV
Ramis
S
SAS
SPSS
Stata
Synon
Xbase++
5) Data-stream languages
APE
AVS
Iris Explorer

6) Database driven GUI Application Development
Genexus
Progress Dynamics
UNIFACE
SB+/SystemBuilder

7) Screen painters and generators
FOURGEN CASE Tools for Rapid Application Development by Gillani
Genero Studio
Oracle Forms
Progress 4GL ProVision
Unify Accell
SB+/SystemBuilder

8) GUI creators
4th Dimension (Software)
eDeveloper
MATLAB's GUIDE
Omnis Studio
OpenROAD
Progress 4GL AppBuilder
Revolution programming language

9) Web development languagues
ColdFusion