Node.js

Node.js enables server-side JavaScript development, launched in 2009 by Ryan Dahl to unify front- and back-end coding. With 20+ million npm packages available, it outperforms #5 Git in ecosystem growth speed, adopted by 40% of web developers for backend services. Its event-driven, non-blocking architecture handles 50,000 concurrent connections per thread, 3x more than traditional Python servers, while reducing latency by 70%. This efficiency powers real-time applications like streaming and chat, making Node.js a cornerstone for modern, scalable apps.