sQuiz.gg is one of my (originally personal) most complete projects. It is a web application that allows Twitch streamers to engage with their community through general knowledge quizzes. I started working on it during my studies, and now I continue to maintain it as needed. The project now has a team of volunteers (writers, developers, moderators), and the hosting and development of certain features are funded by streamers. This project has over 85k registered users and includes more than 80k general knowledge questions.