I've built a little something where you can create your own poster from all your running (or cycling/whatever) activities from Strava. I wanted to make a poster for myself but couldn't find a website for it, and this little side project came to life. I've been running the site in Sweden for a while, but just now launched it for EU + US.
Tech wise, the site is running on Netlify, and I'm using a buch of API:s (accessed from Netlify Functions) for things like fetching from Strava, handling Stripe payments and sending the prints off to print providers.