I've used a live-preview app (http://marked2app.com http://marked2app.com) for a few years that I've been happy with for smaller projects, but I really like how

I've used a live-preview app (http://marked2app.com http://marked2app.com) for a few years that I've been happy with for smaller projects, but I really like how they've created a Scrivener-like IDE with integrated source code control.