Customizable Button Loader In JavaScript – Btn-loader
Btn-loader is a tiny, dependency-free JavaScript library that replaces the regular button with a customizable loading indicator when clicked.
JavaScript & CSS loading indicator
16 Animated CSS3 Loaders – LoadLab
Yet another CSS loader collection that provides 16 animated loading indicators/spinners based on CSS3 animations and plain HTML structure.
Google Loaders Redesign In Pure CSS
A pure CSS library that recreates the Google loading indicators (loaders, loading spinners) with pure CSS/CSS3.
Basic Loading Screen For Material Design Lite – material-loading
The material-loading lets you create a fullscreen loading screen for official Material Design Lite framework.
Rotating Loading Spinner In JavaScript – ZlataLoader.js
ZlataLoader.js is a minimal JavaScript library to create animated loaders that rotate a loading spinner of your choice along a circle.
Facebook-like Context Loader In Pure JavaScript – contextLoader
Yet another JavaScript library which applies a Facebook-inspired animated context loader/placeholder to any container element you specify.
9 CSS Only Loaders
A lightweight collection of 9+ loaders, loading indicators, preloaders styled and animated with pure CSS/CSS3.
16+ Pure HTML / CSS Loading Spinners – Spinners.css
This is another collection of 16+ single- or multi-element loading spinners built with pure HTML/CSS and animated by CSS3.