Open-source, free, multi-platform BASIC compiler, with syntax similar MS-QuickBASIC (including the GFX statements), that adds new features such as pointers, unsigned data types, inline assembly, a pre-processor and many others.
ForceBasic - This is programming language for development software. Selecting unit library you can write program for some operation system. ForceBasic compiler can build crosspatform code, who executing with help virtual machine.