Front-matter parser https://github.com/jonschlinkert/gray-matter
Image resizing, in the browser, with high-speed and high-quality: https://github.com/nodeca/pica
human friendly i18n for JS http://nodeca.github.io/babelfish/
Live reloading web server for local dev https://www.browsersync.io/docs
A neat wrapper around node.js fs.watch / fs.watchFile / FSEvents https://github.com/paulmillr/chokidar
Templating in JavaScript https://mozilla.github.io/nunjucks/getting-started.html
Slugifies a string https://github.com/simov/slugify
A library for working with dates and times in JS https://moment.github.io/luxon https://github.com/moment/luxon