The best replacement for media queries is viewport.

The best alternatives to media queries are rated as following:
★★★★★  viewport
★★  responsive design
★★  mobile site
★  adapt.js

Your alternative for media queries is not listed? Suggest!
Speaking about media queries, one probably shouldn't forget about less.

Other search terms related to media queries and their ratings are:
★★★★★ less
★★ less css
You have in mind a companion for media queries and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of media queries in all years. Click on graph for more.
media queries
viewport
responsive design