AE Scripts has released ft-Toolbar by Francois Tarlier. This script gives the ability to make your own custom toolbar in After Effects with effects, presets, or any commands you use the most often. At first glance it seems similar to Quick Fx Palette (a 'button bar' for effects and presets).
- lets you edit the UI: add, delete, order, config buttons of your toolbar.
There's a free trial of the full version of the script which is fully functional without a license for 2 weeks. Here's a demo by Lloyd Alvarez: