You can save time, money and a bit of your sanity with these tech devices designed for entrepreneurs.
Users sign up and Square mails out a free dongle -- that's simply a small device -- which plugs into your iPhone's headphone jack. Then customers can swipe their cards, sign the phone's touchscreen, and head out. Square charges 2.75% per transaction, lower than most merchant accounts.
Dorsey designed the product after his friend, a glass artist, lost out on a $2,000 sale, because the buyer didn't have enough cash on hand. But Square's simplicity means it can be used by anyone from the babysitter to the family having a yard sale to Girl Scouts hawking cookies. Now that's easy.