FreeBASIC https://en.wikipedia.org/wiki/FreeBASIC https://en.wikipedia.org/wiki/FreeBASIC is a modern, GPL'd compiler that implements nearly all of Microsoft Qu

FreeBASIC https://en.wikipedia.org/wiki/FreeBASIC https://en.wikipedia.org/wiki/FreeBASIC is a modern, GPL'd compiler that implements nearly all of Microsoft QuickBASIC along with a bunch of extensions. Runs on *nix and Windows. QuickBASIC was a rather nice BASIC dialect for its era, and you can write well-structured and modular procedural code. Along with a bunch of 2450 GOTO 410 lines, if you really want.