What Is The Term For This Slide Sidebar Menu Plugin?

Quick question for the clever ones. ??
What is the technical term for a plugin with a slide function like this? I mean if i were to search for other plugins, with a button that, when pressed shows a sidebar like this plugin:

I love this plugin, but what i’m looking for is one that offers user posting, instead of a contact form.

It would be so awesome if some of you could point me in the right direction, been searching for half the day now ??
Thank you guys!