My story: ReNoun
Node.js
Express
TiDB
MySQL
Bulma
ReCapcha
Merriam-Webster API
An online game that helps students practice spelling and activate their vocabulary.

ReNoun is a fun online game where given a longer word, the player has to make as many words as possible from the letters in the longer word.
Like LSavr, ReNoun was built with Node.js, Express, and TiDB (a MySQL-compatible serverless database), with Bulma for a quick and simple interface. The interactivity of the interface is handled by pure JavaScript event listeners.
ReNoun also uses Google's ReCaptcha for rudimentary spam control in user registration.
Using these technologies allowed me to free up time to focus on the game's logic. I seeded the database with Desi Quintans's list, which I slightly modified for ReNoun's purposes. For validation of user input and dynamic addition of new words to the database, I used a couple of Merriam-Webster APIs.