Markdown Service Tools is a collection of OS X Services to make creating Markdown-formatted text that much easier.

Write your entries by email
Every night we'll email you the question "How did your day go?" Just reply with your entry and it's saved here instantly.
Peek at the past every day
Your nightly email has a random entry from the past. Forget what you were up to a week or a month ago? We'll show you.

I made a neat mailto bookmarklet that uses the page title as the Subject, and puts the URL and any selected text into the Body. It was tricky because Javascript wanted to interpert the %0D%0A (crlf) too early, so I had to escape the %’s as %25, i.e. %0D%0A -> %250D%250A -> %22%250D%250A%22 (when surrounded by double quotes).

Ponyfish is a FREE web-based tool that allows you to create your own RSS feeds from almost any web page.

Jekyll is a simple, blog aware, static site generator. It takes a template directory (representing the raw form of a website), runs it through Textile or Markdown and Liquid converters, and spits out a complete, static website suitable for serving with Apache or your favorite web server.