CodeBase.es

javascript/html5

• JSGB (0.02) a JavaScript GameBoy Emulator [demo|download]
  It's a Nintendo GameBoy Emulator and debugger (written in JavaScript).
  It runs many games at full speed (using a browser with a fast JavaScript engine).
  Recommended browser: Chrome/Chromium.
• riffwave.js (0.03) [demo|download]
  Audio data encoder for HTML5 audio synthesis.

php

• PHP Mail tester [download]
  Checks if an email account is valid (gets MX records and asks to mail servers).