Google is making it easier than ever to send money over the internet with the integration of a "Send Money" option into Gmail using its Google Wallet feature. Users just need to click on the $ icon in their attachment options to send money to friends. The feature will be rolling out to Gmail users aged over 18 in the U.S. over the next few months. It will be free to send money from your Google Wallet Balance or directly from your bank account, and you can also pay with your credit and debit cards for a fee of 2.9% per transaction (minimum $0.30). Receiving money is free.