I'm talking about a horizontal scrolling menu with "left" and "right" arrows to scroll. I have been seeing this thing everywhere since I started working on a design that uses them. What are they called?
As UX Labs mentioned, these are scrolling tabs. Sometimes they are called "scrollable containers." On Windows Phone, they used to be called "Pivot Control."
Sample code: https://codepen.io/srees/pen/pgVLbm