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.
nuBASIC is an implementation of an interpreter of the BASIC programming language and IDE.
It has been designed mainly for educational purposes and it is suitable for simple games, educational or small business programs.
Dummy2d is simple and fast programming language similar to early BASIC. Dummy2d mostly useful for 2D games. To create Dummy2d games you need Windows OS. Dummy2d games will run on Winowsd and Linux (through WINE).
Download and info: https://sourceforge.net/projects/dummy2d/files/
Dummy2d IS TOTALLY FREE FOR COMMERCIAL AND NON-COMMERCIAL USE.