Stickybits is a lightweight alternative to
position: sticky polyfills that works perfectly for things like sticky headers.
The Scroll Behavior specification has been introduced as an extension of the Window interface to allow for the developer to opt in to native smooth scrolling.
In this tutorial you will find out how to create a sticky navigation bar that remains fixed to the top after scroll by using CSS and jQuery.
PrognRoll is a tiny jQuery plugin that creates scroll progress bar on the page. You can also customize the progress bar.
It has different easing functions and tries to use CSS-Transitions to animate elements.
Bootstrap has only a traditional horizontal carousel. This plugin has the HTML and CSS to get it to animate vertically with up/down carousel controls.
Create a simple scroll indicator for your website by using css and jQuery. An animated arrow to show that content is below the fold.
A simple jQuery plugin for changing background color while scrolling.
A tutorial about creating lightweight smooth anchor scrolling with jQuery. Also a basic scrollTop function included.
It's open-source (MIT), free and easy to use.