For years I've used Ecto, and loved it. However, for the last few months I've had problems with it: it's crashing or hanging up constantly, and that's getting in my way.
So what should I switch to? I tried Mars Edit a long time ago, and have the vague memory that it was all right. I've installed the ScribeFire extension, and will play with that a bit (though I'n not seeing an ability to set categories, which may be a deal-breaker). But I liked having a stand-alone blog editor for offline writing, and would like to find another one.