Square’s free Cash App is one of the easiest and most popular ways to send money to friends and family. Simply link the app to your bank account and create your unique $cashtag. You can then supply anybody who owes you money with your $cashtag and watch the payments roll in – totally free and deposited directly to your bank within minutes. Sign up to their referral reward program then refer a friend and you’ll both be rewarded with $5 – probably the easiest five bucks you’ll ever make.