X11-Basic is a versatile programming language similar to GFA-Basic on the ATARI-ST, offering graphics, sound, and more. It is structured without line numbers and supports complex numbers and big integers. Available on various platforms including UNIX, Linux, MAC-OSX, and Raspberry Pi, it comes with a BASIC compiler to create standalone binaries. The interpreter (xbasic) is quick and small, with the ability to run basic-scripts like *.cgi-Scripts for web input handling. X11-Basic can be compiled into bytecode and interpreted by a virtual machine. Additionally, it can convert old ANSI-Basic programs to X11-Basic. It’s free to use and modify, but with no warranty.
https://x11-basic.sourceforge.net