Smoke is a jQuery plugin that is designed for use with Bootstrap 3 and has lots of helpful features including form validation, notifications, progress bar and more.
Progress Nav is an animated progress bar that highlights sections of a page that are currently in view.
PrognRoll is a tiny jQuery plugin that creates scroll progress bar on the page. You can also customize the progress bar.
Scrollgress is a simple, lightweight jQuery plugin used to display a progress bar at the top of the page that fills up as the user scrolls.