PennApps | 856 followers on LinkedIn. PennApps XXV: Ocean edition happening this fall, September 20-22nd. 🐳 Apply now thru Aug 10 — apply.pennapps.com | Founded in the fall of 2009, PennApps was the nation's first student-run college hackathon. Since then, it has spurred a revolution in the way engineering students develop and showcase their skills, spawning an entire "league" of hackathons across the nation. In past years, over a thousand students from the U.S. and other countries like Switzerland, Canada, England, and Singapore have converged in Philadelphia for the spring and fall editions of the event for a weekend of creation and discovery.