vanilla-lazyload
LazyLoad is a lightweight (2.4 kB) and flexible script that speeds up your web application by deferring the loading of your below-the-fold images, videos and iframes to when they will enter the viewport. It's written in plain "vanilla" JavaScript, it leve
vue-head
Manipulating the meta information of the head tag, a simple and easy way
yoastseo
Yoast client-side content analysis
gulp-sitemap
Generate a search engine friendly sitemap.xml using a Gulp stream