The best replacement for haml is erb.

The best alternatives to haml are rated as following:
★★★★★  erb
★★★  slim
★★★  jade
★★  markdown
★★  mustache
★★  haml-rails
★★  handlebars
★  haml
  twig

Your alternative for haml is not listed? Suggest!
Speaking about haml, one probably shouldn't forget about sinatra.

Other search terms related to haml and their ratings are:
★★★★★ sinatra
★★★★★ jekyll
★★★ middleman
★★★ rails
sass
erb
You have in mind a companion for haml and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of haml in all years. Click on graph for more.
haml
erb
slim