You have complete control over the style with CSS and the functionality with 12 options including 4 events! This makes Bubble.js very extendable and style-able. Any content that can be loaded into a page with AJAX can pretty much be loaded into a Bubble. The bubbles are big tooltips that can include things like instructions, notes, images, videos, or any other HTML content. With a nice animation out as well as some strong usability with keeping it there when you want it there, Bubble.js is a solid solution for for inline content anywhere, and because Bubble.js loads on a click it works with mobile devices.