Automatically generated thumbnails and WebVTT with time synced media fragment URLs for video files.

monkes21 gem - generate your own monkes twenty one 28×28 pixel avatar images from the 100+ official text attributes (via built-in spritesheet); incl. 2x/4x/8x zoom for bigger sizes and more

A collection of SCSS tools for creating responsive websites. Includes a simple but powerful grid framework, media query helpers and sprite helpers.

Polymer simplifies the creation of sprite images for web applications, while also generating nifty Sass mixins. CSS files are available for non-Sass users.

Use famfamfam-silk icons as bootstrap sprites

artfactory - generate your own art images from text attributes (via spritesheets); incl. 2x/4x/8x zoom for bigger sizes and more

Ruthlessly sprites SVGs