FOSS implementation of QuickBASIC, compiler and SDK
Free BASIC language compiler
FreeBASIC Compiler (Development version)
FreeBASIC Compiler (Release version)
FreeBASIC is a multi-platform BASIC compiler with syntax similar to MS-QuickBASIC (including graphics statements). It adds features like pointers, unsigned data types, inline assembly, C and C++ bindings (e.g. Allegro, SDL, OpenGL, GTK+, Windows API), and a pre-processor with macro support. FBedit is an additional IDE to the compiler.
FreeBASIC language compiler
Open Source BASIC Compiler. The BASIC syntax is compatible with QBASIC.