LineProgressbar is a lightweight and customisable jQuery progressbar plugin. It's under MIT licence.
A simple snippet about creating animated intro with timer progress bar by using jQuery and CSS.
PrognRoll is a tiny jQuery plugin that creates scroll progress bar on the page. You can also customize the progress bar.
WaitingFor is a modal dialog with progress bar for Bootstrap.
A simple jQuery progress bar plugin for Bootstrap forms.
ProgressBarWars.js is a tiny(Star Wars Tribute) jQuery plugin that allows you to display an animated horizontal progress meter.
Preloader.js is a jQuery plugin to create YouTube like progress bar for your website. It's simple, fast and customizable.
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.
A tutorial about creating Multi Step Form with Progress Bar using jQuery and CSS3. You can change your classic long forms into smaller logical sections and convert it into a multi-step form with a cool progress bar. Could work for lengthy processes like registration, checkout, profile fillups, 2-factor authentication logins, etc.
LoadGo is a jQuery plugin that allows you to create a progress bar by using your own images.
ToProgress is a lightweight, no-dependency top progress bar library.
A jQuery plugin that show progress indicator on page scroll looks like Youtube progressbar. Youtube progressbar indicates while page is loading, but this plugin indicates on page scroll.
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.