Feedmyapp is a great one to try, we got a surprising amount of traffic from them. Also, definitely try to reach out to the community here. The feedback will b

Feedmyapp is a great one to try, we got a surprising amount of traffic from them. Also, definitely try to reach out to the community here. The feedback will be immediate and much more critical (in a good way) than the general public. I would reach out to most bloggers in your industry. Also, try makeuseof.com, lifehacker.com, centernetworks.com. Also make sure to list your company on crunchbase and any other directories available. Good luck!