Othman's Shop is my flagship demo web app (hopefully one day I can bring it to Android). It is a fictitious retail store that sells a wide variety of products ranging from physical products such as footballs, glasses and phones to virtual products such as pdfs and software. The order processing pipeline functionality (i.e from adding items to cart all the way up to order confirmation) uses a module that I wrote using the C# language and the entire application is brought together using the ASP.NET framework. The application is light weight, fully functional and implements all the features you have come to expect of a modern E-commerce solution e.g shopping carts, checkout and more. A list of its key features is shown below.
Disclaimer: The code is only for demonstration purposes and as such no attempt should be made whatsoever to use it in any production level applications.