Tokenizers available for Linux and Windows, to wrap your own Integrated Development Environment (IDE) around.
http://www.parallaxinc.com/html_file..._tokenizer.htm
Word is that the Basic Stamp Editors will soon be available for Mac OS X and Linux soon. That's the last excuse for keeping Windows on my laptop.
Now, I think it would be neat to have a simulator that will work off the tokenizer's output.