Xoom
Xoom lists a $0 transfer fee for a $500 to $2,999.99 USD-to-DOP payment funded from a bank account and delivered to a bank account. It also advertises bank, wallet, cash and home-delivery options for the Dominican Republic.
Why it is not ranked: The final exchange rate and recipient amount still have to be generated in the calculator. A zero transfer fee alone is not an all-in price.