List of Free code API
.NET Excel API, Excel Component
Spire.XLS for .NET is a professional Excel .NET component that can be linked into any type of .NET 2.0, 3.5 or 4.0 project, for ASP.NET web sites or Windows.
Hijri Converter API
This project is aimed to create a simple RESTful API using VB and ASP.NET to do Hijri-to-Gregorian and Gregorian-to-Hijri conversion.
This project about Yahoo Weather Ap? services. this project get weather result using yahoo api by Asp.Net.