This plugin allows you to supply alternate paths for gzip enabled and non-gzip capable devices.
Here’s an example:
<link rel="stylesheet" href="main.{exp:easy_gzip_alternatives normal='css' gzip='gz.css'}"/>
With gzip support, you’d get
<link rel="stylesheet" href="main.gz.css"/>
Without gzip support, you’d get
<link rel="stylesheet" href="main.css"/>