In my web app built on Laravel, which under the hood uses an npm/Webpack build process, I'm currently using the SCSS icon sheet versions of FontAwesome like thi
netcdf-java
z-notation
loadable-component
railtie
orientation
rmark
hsv
telerik
kube-scheduler
wcag
worklight-adapters
semigroup
annotation-processor
check-constraints
qstackedwidget
codecompare
notificationcenter
shake
susy
matlab
data-sharing
angular-schematics
canon-sdk
pipedrive-api
insert
remote-ftp
django-1.5
doskey
contravariance
gesturedetector