SmallBASIC is a fast and easy to learn BASIC language interpreter ideal for everyday calculations, scripts and prototypes. SmallBASIC includes trigonometric, matrices and algebra functions, a built in IDE, a powerful string library, system, sound, and graphic commands along with structured programming syntax
Just noticed the setup external editors link on the main page:
"https://smallbasic.github.io/language_support.html"
needs to be changed to
"http://smallbasic.github.io/pages/language_support.html"