bpython - fancy curses interface to the Python interpreter
http://www.noiseforfree.com/bpython/

bpython is a fancy interface to the Python interpreter for Unix-like operating systems.

Syntaxhighlighting, Autocomplete, etc.

Welcome to WPS, a PostScript and PDF interpreter for HTML 5 canvas. Note that to see and run the examples, JavaScript must be enabled and your browser must support HTML 5 canvas (latest Firefox, Opera and Chrome should work). This document allows you to try simple PostScript programs in the WPS sandbox. A few examples are presented here accompanied by a brief description of the interpreter and listing some implementation notes for my future reference.

Interprets PDF files for output with HTML 5's <canvas> element

PostScript、インタープリタ

Really neat thing: a postscript interpreter written in JavaScript using Canvas as a drawing surface. Not sure how practical this is, but it sure is fun thing.

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I gave a talk at London Ruby User Group yesterday, based on the work I’ve been doing on Heist, my Scheme interpreter project. I wrote the core of a basic Scheme interpreter in about 15 minutes as a live-coded demo (well, kind of – the coding was pre-recorded so I could focus on talking), which seemed to go down pretty well.

15分で作るScheme interpreter in Ruby.

A talk on how to implement a Scheme interpreter in 15 minutes. The parsing is taken care of primarily by Treetop, a syntactic analysis / parser creation DSL for Ruby.

Bibliography of Programming Languages Implementation

Ejacs is an Ecma-262 compliant JavaScript interpreter written entirely in Emacs Lisp. It should work in GNU Emacs versions 22 and higher.

Ejacs is an Ecma-262 compliant JavaScript interpreter written entirely in Emacs Lisp

JavaScript in emacs

ELispで書かれたEcma-262 インタプリタ。Emacs22以降で動くらしい

emacsでjsインタプリタ。alertとかDocument.writeとかが使えないから微妙

Implementing a programming language is an experience no programmer should go without; the process fosters a deep understanding of computation, and beside that, it's fun!

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Writing a new programming Language