In my sophomore year, I participated in a business organization in which you were to come up with a business model/plan, and present it to mock venture capitalists. Blupay was designed to be a platform through which users without smartphones could still access the features of modern banking. Blupay 1.0 (which I wrote 2 years ago, also in PHP) was an interactive live demo in which my partners and I sent each other money over SMS, to show how fun the service was to use.
While the demo and presentations were very successful, the original code was terribly written. As a result, I recently decided to re-write the project for fun, this time adding some more functionality and ease of use.
Blupay 2.0 continues to use the Twilio REST API in PHP. User data is stored in a mySQL database. The entire project is hosted live on my personal server.
2.0 - Initial release of my re-write of Blupay.
Added enhanced logging, testing mode, PHP session tracking. Basic I/O has been completely rewritten, along with DB access. Send/Request money features are still in progress.