BASIC programming language

Microsoft GW-BASIC
Microsoft QuickBASIC -> FreeBASIC compiler, QB64 compiler
Microsoft QBasic
Microsoft Visual Basic -> Gambas
Microsoft Visual Basic .NET VB 7, 7.1, 8.0, 9.0, 10.0

Microsoft Small Basic smallbasic.com MSDN: Beginner Developer Learning Center > Kid's Corner > Links > Small Basic forum blog wiki(Samples, Teaching Small Basic, Recipes) doc / api Extend SmallBasic

Free BASIC Compilers and Interpreters
** KidBasic Basic-256 Windows, Linux, .... 3-pan windows, Program, Text Output, Graphics Output, debug steps
* SmallBASIC Windows, PalmOS, ...., no graphics
* SiMPLE
* Bywater BASIC Windows, like GW-BASIC

Just BASIC Windows, cannot break infinite loop? syntax error problem?
wxBasic Linux, Windows, .... no unstructured BASIC
Gambas Linux only
thinBasic Windows installed on c:\thinBasic, no unstructured basic

UBASIC interpreter
Chipmunk Basic for Macintosh