I run Sails 0.9.7 and have installed Handlebars which is supported by Consolidate.js and therefore is supported by Sails
I can serve pages from .handlebars
FYI,
If you're using Sails 0.10 or above, I have published an NPM package to generate default handlebars views at https://www.npmjs.org/package/sails-generate-views-handlebars
There is also a proposed PR for sails-generate-backend in order to properly support layouts and partials for handlebar when using ‘sails generate –template==handlebars’ with no additional code and automatic discovery of partials based on a path (aka. views/partial/**)
See: https://github.com/balderdashy/sails-generate-backend/pull/9