Node

• Background process that parses the text of all visited sites and saves them in a searchable archive
• Background process that monitors keystrokes and visually presents them using canvas

AppleScript

• Done. Take highlighted text and upload to private Gist - https://gist.github.com/1190336

Textmate

• Format JavaScript on save

Ruby

• Create gem that simply looks for inline images in a stylesheet, parses them as data URIs, and provides an IE7 fallback.