Here’s a few of the better .NET open source projects which are making a difference to .NET developers worldwide, and it just shows that the open source .NET community is alive and well.

Amazon DevPay is a simple-to-use billing and account management service that makes it easy for developers to get paid for applications they build on Amazon Web Services.

This VB.Net code checks the validity of a credit card number. Pass a credit card number to the function and it returns true or false based upon the CC number's validity.