Card Cloud is a free business card app for Android & iOS that lets you share contacts instantly with other Card Cloud users, or through email from the mobile site. It's not particularly sophisticated, but set up & linking your social accounts is super-easy, and then you’re ready to share. If the person you’re trying to connect with doesn’t have the app you can email them a card there and then. And it gives your contacts context, saving a GPS marker with the business card to remind you where you met. All this information is also stored in your Card Cloud dashboard, along with any notes, tags or ratings you want to add. I can’t tell you how handy that’s proving with the terrible memory I have.