Open-source, free, multi-platform BASICcompiler, 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.
Open-source tools, such as the ccompiler4pic32 compiler, related to Microchip Technology's PIC microcontrollers and dsPIC digital signal controllers. http://www.microchip.com