FakeScroll is a lightweight vanilla script for creating nice looking custom scrollbar.
PrognRoll is a tiny jQuery plugin that creates scroll progress bar on the page. You can also customize the progress bar.
Optiscroll is an tiny and highly optimized custom scrollbar library for modern web apps.
Customize scrollbar in modern browsers with smooth scrolling experience.
It highlights the scrollable area depending on the scrolling amount, thus efficiently explaining to a user what exactly can be scrolled, and is there much to scroll.
ScrollMenu is a new interface to replace your old boring scrollbar. It gives a user sense of where they are in a page and how long is that section. With a high customizibility of plugin you can have a unique user experience.
Slick Custom Scrollbar lets you replace the default browser scrollbar on long content with a custom one instead, styled using pure CSS. Easily modify the look of the scrollbar using all the power afforded to you by CSS, whether it's giving it a background image, rounded corners, CSS3 shadows, or changing its thickness etc.
Scrolline.js is a jQuery plugin to create a scroll line bar indicator on the page.
Scrollator is a jQuery-based replacement for the browsers scroll bar, which doesn't use any space. Has very good performance
Tiny Scrollbar is a nice and elegant way to enable the scrolling of content on mobile and desktop devices. Its designed to be a dynamic lightweight utility.
ScrollMagic is a jQuery plugin which essentially lets you use the scrollbar like a progress bar.
iScroll can handle any element that needs to be moved with user interaction. It adds scrolling, zooming, panning, infinite scrolling, parallax scrolling, carousels to your projects and manages to do that in just 4kb. Give it a broom and it will also clean up your office.
jQuery.scrollpanel is a simple vertical scrollpanel that replaces the native vertical browser scrollbar with a CSS-stylable custom scrollbar.
Nicescroll is a jQuery plugin, for nice scrollbars with a very similar ios/mobile style. It supports DIVs, IFrames, textarea, and document page scrollbars.
Nicescroll is customizable and supports both vertical and horizontal scrollbar.
perfect-scrollbar is a tiny jQuery scrollbar plugin for any websites and scrollable region.