Exchanging contact information is a pretty common activity on mobile phones and developers of all platforms strive to make the process as quick and painless as possible. Read on to see what's probably the best you can get for Windows Phone 7: ContactSwap.

The concept is simple: create one or more profiles (in the event that you want to include different details), fill them with your contact info, have someone near you touch the 'SWAP' button at the same time you do. In a second you will be prompted to download their contact card and optionally save it on your device.

For your own security, you can also set a 4 digit pin before exchanging your info.

This is a very simple yet effective app that makes the process as smooth as it can be: just keep in mind that you must have a decent GPS signal (so that it can detect who's near you) and network.