I use taxhawk.com and would absolutely recommend it, I think the UI is fantastic (and without a fantastic UI, I'd just continue to do taxes with paper and pen). I've been using it since 2011.
I have heard good things about freetaxusa.com as well.
Both are very reasonably priced, only $15 for state - federal is free. Since I have business income TurboTax wants over $100 to do my taxes.