This addon will completely replace your chat frame with a new one, with modern features:

Even with the fancy features, it is fast.
Stylish themes (Dark, Blizzard, ElvUI and GW2)
Edit-mode free chat box resizing/moving
Configurable timestamps
Space out messages, not lines.
Persistent command/typed chat history and navigatable with arrow keys
2,500+ message history, persisting across sessions
All chat settings are global, across your account.
Shorten frequently seen message components
Change the fonts and sizes

Why write a new chat addon?

Initially it was just about getting the timestamps aligned properly. However after starting I realised that I needed to replace the chat frames to get the right effect.

As I was replacing the frame I could probably improve the default UI significantly if I invested the time. This addon is what has been created so far.

Upcoming Features

Feature requests are welcome, and quite a few features are planned for the future releases already.

Inspiration

These addons helped shape what Chattynator became:

LS: Glass - the smooth scrolling and excellent performance
Prat - the quintessential chat addon