Instagram Infinite Scroll is a single page Infinite Scroll app built using jQuery, and CSS.
RRSSB is a solution for responsive social share buttons that you can easily customize it by tweaking a few variables. SVGs allow for tiny file size and retina support.
Simple, light, flexible, and good-looking share button jQuery plugin.
ContentShare is a jQuery plugin which lets you share the exact content on a page which you actually want to share. It enables you to share selected text on your social network rather the default text specified in the tags.
A tutorial about Creating Responsive Share Buttons by using jQuery and CSS.
Advantage of creating own set of share buttons is that, it goes well with your layout, and you don't have to rely on bulky files that are loaded from anonymous servers, which could also slow down the page loading time significantly.
HideShare is a social sharing plugin that inserts social sharing links. Allows for sharing of current page with the option for sharing any link or image. Requires that Font-Awesome fonts and CSS be installed.
Slingpic is a jQuery image sharing plugin that makes it easy for your users to share your images across their social networks increasing traffic to your site.
jtwt.js is an easy-to-use jQuery plugin that allows you to display your recent tweets on your website or elsewhere.