Here are some other solutions that are free, open source and under active development.
- Grav (https://getgrav.org/) (PHP)
- Bolt (https://bolt.cm/) (PHP)
- Pico (http://picocms.org/) (PHP)
- Monstra (http://monstra.org/) (PHP)
- Hugo (https://gohugo.io/) (Go)
- VuePress (https://vuepress.vuejs.org/) (Vue.js)
- Gridsome (https://gridsome.org/) (Vue.js)
- Hexo (https://hexo.io/) (Node.js)
- Jekyll (https://jekyllrb.com/) (Ruby)
- Pelican (http://getpelican.com/) (Python)
- Metalsmith (http://www.metalsmith.io/) (Node.js)
- Brunch (http://brunch.io/) (Node.js)
- Harp (http://harpjs.com/) (Node.js)
- Ivy (http://mulholland.xyz/docs/ivy/) (Python)
- Vuelog (https://myst729.github.io/Vuelog/) (Vue.js)
- Gatsby (https://github.com/gatsbyjs/gatsby) (React)
- MkDocs (http://www.mkdocs.org/) (Python)
- Hakyll (https://jaspervdj.be/hakyll/) (Haskell)
- Lektor (https://www.getlektor.com/) (Python)
- Bi Sheng (https://github.com/benjycui/bisheng) (Node.js)
- Nuxt (https://nuxtjs.org/) (Vue.js, with
nuxt generate
command) - Nextein (https://nextein.now.sh/) (React, Next.js)
- Gustavo (https://github.com/eggplanetio/gustavo)
- Phenomic (https://phenomic.io/)
- React Static (https://github.com/nozzle/react-static)
- Netlify CMS (https://www.netlifycms.org/) (React)
- Prose (http://prose.io/)
- Forestry (https://forestry.io/) (Jekyll, Hugo, Git)
- now (zeit)
- Firebase Hosting
- Netlify
- Surge
- GitHub Pages
- Forge
- Aerobatic
- Google App Engine
- IBM Bluemix
- Pagekit (https://pagekit.com/) (PHP)
- October (https://octobercms.com/) (PHP)
- Sulu (http://sulu.io/) (PHP)
- Roadiz (https://www.roadiz.io/) (PHP)
- KeystoneJS (http://keystonejs.com/) (Node.js + MongoDB)
- Apostrophe (http://apostrophenow.org/) (Node.js + MongoDB)
- Concrete5 (https://www.concrete5.org/) (PHP)
- Postleaf (https://www.postleaf.org/) (PHP)
- Neos (https://www.neos.io/) (PHP)