I did briefly use SDL Basic (on my laptop) a few years back, and even helped update the documentation - English was not the developers first language. Sadly, as it had no way to compile the programs into standalone executables (anyone running SDL Basic programs had to download SDL Basic editor) at the time, I went back to Amiga programming.
Also the SDL Basic forums were (are?) very quiet and last time I was on there, heavily hijacked by spammers
The language itself is based on AMOS/AMOS Pro and is easy to pickup, especially if you have programmed in Basic before. It was great for developing your own programs, as long as you weren't planning to distribute them.
Regards,
Lonewolf10