Square Cash: Send Money Quick & Free
By the creators of the Square card swiper. This is my preferred method for paying contractors. It's free, it's instant. You just need to connect a debit card.
For a business to accept payments the charge is only 1.5%. Half of what Paypal and Stripe charge. The downside is it has to be a debit card so it's not an end all solution.
What services do you use to pay/get payed?