Pikabu is a framework for creating off-canvas flyout panels. It has simple markup, supports native scrolling, and is fully customizable. No theme, just barebones HTML and CSS.
Pikabu is super customizable to your needs. This module is also hosted on Mobify’s CDN. This thing works on everything. It is progressively enhanced the experience for devices that support it.
GitHub: https://github.com/mobify/pikabu
License: MIT License