BeatEdit will change the way you animate to music in After Effects. It auto detect beats in a music track and allows you to do anything with them: Create beat markers, animate sliders, animate layers, repeat keyframes and much more.
In the new After Effects CC 15.1 you can now import json and jsx files to use directly in expressions. So instead of copying and pasting your expressions code again and again, you can keep your functions in one, central location now and access them easily from any expression.
With the just released After Effects version 2017.2 (a.k.a. 2017 Spring Update) the one thing you don't find
among the list of shiny new features is that the UI of many extensions looks pretty ugly now.
Not only the buttons are round, also all icons have a round background.