CodeCanyon - Ninja Kick: Sliding Panel v2.3.2 for WordPress
Ninja Kick: Sliding Panel is a premium WordPress plugin that adds hidden off-canvas sidebar with push or sliding animation on every page of your site. Extra content you put in the sliding panel will wait for its time to reveal! You can utilize this plugin in so many ways: show visitors menu or your social feeds, offer an subscription, display banners, kick in registration form or shop's basket etc etc etc. Popups are so 2009, guys!