Your Voice Net is a survey system for a Kenyan NGO. I developed this website using database first approach. It is a website with 2 types of users: admin and regular users. Admins create surveys, while users fill them out for a certain payment. It has 3 kinds of plans: basic which allows 1 fillable/creatable survey per week, standard which allows 5 per week and premium, which allows 15 surveys per week. Surveys are regularly published on the website by admins and received by those registered on it.
The tools I used to create this product include .NET Stack, payment gateways (PayPal, Bitcoin, MPesa.), and SQL Server.