A Hack the Valley camera for bikes that warns you about cars coming from behind

An N-body gravity simulator built from scratch, checked against real JPL planet data

Spotify Wrapped for GitHub, a full stack app on AWS that analyzed 3,000+ commits from 42 users

Roasts your resume with Claude, then gives five real fixes

Turn your volume by rotating one finger in front of a webcam

An AI assistant on Telegram that logs sales and expenses, piloted with 6 local small businesses

Fingerprint and DNA matching for forensics, plus a skin health assistant