Netty is a NIO client server framework which enables quick and easy
development of network applications such as protocol servers and
clients. It greatly simplifies and streamlines network programming
such as TCP and UDP socket server.

'Quick and easy' doesn't mean that a resulting application will suffer
from a maintainability or a performance issue. Netty has been designed
carefully with the experiences earned from the implementation of a lot
of protocols such as FTP, SMTP, HTTP, and various binary and
text-based legacy protocols. As a result, Netty has succeeded to find
a way to achieve ease of development, performance, stability, and
flexibility without a compromise.