DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. It's written in JavaScript and works in all modern browsers (Safari, Opera (15+), Internet Explorer (10+), Firefox and Chrome - as well as almost anything else using Blink or WebKit). DOMPurify is written by security people who have vast background in web attacks and XSS. Fear not.
JoyPixels is a complete set of emoji designed for the web. The emoji-toolkit includes libraries to easily convert unicode characters to shortnames (:smile:) and shortnames to JoyPixels emoji images. PNG formats provided for the emoji images.