Daring Fireball
Markdown
FreeMarkdown allows you to write using an easy-to-read plain text format, then convert it to XHTML (or HTML).
WindowsBBColors
FreeBBColors is a free command-line tool for saving and loading text color preference schemes for BBEdit and TextWrangler.
WindowsSmartyPants
FreeSmartyPants is a free web publishing plug-in for Movable Type that translates plain ASCII punctuation characters into "smart" typographic entities.
Windows