I've just finished a clean-looking alternative to Twitlonger and Pastebin, with Markdown support.

The last thing on my to-do list is that the site should be named 1p.cx but I'm still waiting for the domain name (bought tuesday) to be activated.

So you can check it at http://1pcx.azurewebsites.net/

For another source of inspiration, I've discovered faviconit.com recently, it's a useful little tool I intend to use again.