See my biography for descriptions of other software I've written that isn't publicly available.

• JavaScript Lisp Interpreter. I wanted to get a feel for just how powerful JavaScript is as a programming language (as opposed to just a scripting language), so I spent an evening writing this: a simple but fairly complete Lisp interpreter in about 450 lines of JavaScript.
• TRS-80 BASIC interpreter applet. I don't recall what might have motivated me to pick this particular application, but the intent was to teach myself Java. By the time it got to the point it is now, I knew Java well enough that I wasn't going to learn anything further by finishing it, and also well enough to hate the way it was written so far, so I stopped working on it. But it's sort of fun; I've gotten a lot of "thanks for the memories" mail from people in response to this applet.
• There's also a minimum spanning tree applet and a pi calculator applet that were my "hello world" programs when I first discovered Java in early 1996.
• Back in graduate compilers class, I wrote a compiler for most of Pascal in T (Yale's dialect of Scheme/Lisp). The Pascal subset included all of the language except for user-defined types (i.e. records), including file I/O and arrays. It produced code for a hypothetical zero-register stack based machine (rather like the Java Virtual Machine, actually), for which we were given an emulator. If you have the T interpreter, you can download the compiler as pj.tar.gz.