prism.js is described as 'Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind' and is an app in the Development category. There are three alternatives to prism.js for Self-Hosted solutions and Online / Web-based. The best alternative is highlight.js, which is both free and Open Source. Other great apps like prism.js are Lolight (Free, Open Source) and code-prettify (Free, Open Source).
code-prettify is a syntax-coloring script to make source-code snippets in HTML prettier. FEATURES - Works on HTML pages. - Works even if code contains embedded links, line numbers, etc. - Simple API: include some JS & CSS and add an onload handler.