Eleventy (11ty for short) is a static site generator rapidly gaining popularity among JAMstack developers. Its learning curve is short and it offers the largest choice of templating languages compared with others popular SSG.
11ty can be used without any configuration it is zero-config out of the box! , but its power comes from the fact that it is backed by the huge Node.js ecosystem. Therefore, when building your static site with 11ty, you can do anything Node is able to do.