Been using free tax usa (www.freetaxusa.com) for a decade now. Just works.
We're fans of Free Tax USA. They have a pretty solid self-employment offering, but we found that we still run into the issue of having to manually save throughout the year for our tax obligation. If anything, we've always thought of our product as a compliment to some of the existing platforms out there for filing.
Taxslayer [0]is nice. I've been using for 3 years.
that being said I have not tested all of the others, it worked so i kept using it.