[lrichardson]

Depending on whether by "platform" you mean the actual software package or not, I will throw http://tech.pro into the mix. (Full disclosure: I am the founder)

Tech.pro is a blogging platform / professional network catered only to the tech world (primarily software development).

Our editor is markdown-based and handles code snippets etc. quite well in addition to having support for embedded frame sites such as jsfiddle/codepen/sqlfiddle/etc.

Although you're writing on the TP platform, you still retain full ownership of your data. You can even download a neatly organized archive of all your blogs (and revisions) in both Markdown and html format at any time.

My Blog: http://tech.pro/leland/blog My Profile: http://tech.pro/leland