Ethereum Name Service
The Ethereum Name Service (ENS), analagous to the Domain Name Service (DNS), allows a user to use semantic text to interact with a specific Ethereum address, without having to remember Ethereum address.
Ethereum Name Service (ENS) - Jordan Leigh, Decypher [14 min video]
This Decypher.tv video explains the concept behind ENS, how it works, and how to register a name.
Building dapps on Ethereum - part 5: Ethereum Name Service and Swarm - Dick Olsson, 2017 [5 min read and Exercise]
Dick Olsson explains ENS and then walks through a local deployment of ENS and using it to interact with a content distribution protocol called Swarm.
ENS Documentation - Introduction - ENS Documentation [4 min read]
An introduction to ENS via ENS's technical documentation.