jbalde

UserAgent Theme Switcher is a simple plugin which lets you change the theme to be displayed according to the detected browser.
Checks from a predefined list useragent so that the user can at will change the theme shown for that browser. 
A user can configure a special theme for example for mobile phones that is lighter and this adapted to these devices
Ideal for displaying themes ready to opera mobile, internet explorer mobile, iphone, android, etc.
Now the cache is not supported but will work so that if it is supported in the future

UserAgent Theme Switcher

UserAgent Theme Switcher is a simple plugin which lets you change the theme to be displayed according to the detected browser

Adrian Hanft

The Browser Specific CSS plugin is a tool that allows developers to easily target different browsers straight from the stylesheet. Browser Specific CSS adds a short javascript to the head of your page that enables you to use browser specific css selectors. For example, targeting Internet Explorer 7 from your stylesheet is just a matter of defining styles with a “.ie7” selector. Every major browser is supported including code for targeting Macs, PCs, and Linux operating systems.
This plugin uses the javascript written by <a href="http://rafael.adm.br/css_browser_selector/" title="Rafael Lima" rel="nofollow ugc">Rafael Lima</a>. No changes have been made to his code, and all the credit goes to him. Thanks, Rafael!
Changelog: 
Version 0.3 
– Update for compatibility with WordPress 2.9
Version 0.2 
– Corrected readme file.
Version 0.1 
– Features of the first version of this plugin include the ability to turn the plugin on and off and to specify a separate stylesheet.

Browser Specific CSS

The Browser Specific CSS Plugin allows you to easily target specific browsers and operating systems from your theme's stylesheet using regular cs …

UserAgent Theme Switcher vs Browser Specific CSS