When I develop websites, there are many times that I wish I could change some aspects of the site, without having to deploy new code (e.g. announcements, feature flags), but setting up a database and an API around it can be an overkill for a simple website.
So I built sheet.spacet.me, a simple service that turns a Google Sheets spreadsheet into a public, CDN-backed, CORS-enabled JSON endpoint. With this, I can create a Google Sheets spreadsheet, then consume the data in that sheet directly from the frontend.