Favorite hacks of 2015

What this post added

This post highlights several engineering innovations that originated from hackathons and were developed into production features in 2015. These include: a prototype for real-time VR coding using React and three.js, an on-board optics design for data center efficiency, the Boomerang app for Instagram, the Stetho debugging platform for Android, the Warp Speed Data Transfer library for fast data migration, and the integration of OpenPGP for secure email communications. These examples showcase the impact of hackathons on product development and engineering infrastructure.