Jekyll is the world's most popular static-site generator. This enables web developers to use many of the features of server-side Content Management Systems (like templates, themes, and blog-awareness) while taking advantage of the speed, security, and simplicity of static sites. Plus, this mighty little Ruby script lives on both your computer and on GitHub's servers, which means you get super-fast hosting that's only a `git push` away, and free for you and all your collaborators!