Is there a good Basic interpreter?

A maybe 10 second search got this:
http://amigojapan.github.com/Arduino-Retro-Computer-with-SD-card-and-LCD-display-and-Keyboard-input-with-BASIC-interpreter/

and this:

and this:
http://ec2-122-248-210-243.ap-southeast-1.compute.amazonaws.com/mediawiki/index.php/Arduino_Basic

and a few more before results from this forum made the list. Your mileage may vary.

Interpreter Basic is a ancient and cruel form of torture supported by masochists and the ingnorant.