A first-of-its-kind iPad app, Felt, enables people to write and send personal, handwritten cards in the mail. Instead of hunting for a stamp or envelope, you can now simply pull out your iPad, select from one of many expertly designed cards and handwrite a personal message on the touchscreen. Felt then prints, seals, stamps and sends the card for you. The Felt app offers several tools to customize your personal message, including different pens and inks, and a handy eraser. After composing your message, you also address the envelope by hand. For a flat rate of $3.99, your writing is printed on premium Mohawk card stock and a kraft paper envelope, then stamped and mailed within 24 hours via the US Postal Service.