Dana Ross

This plugin displays a message at the top of the screen for visitors running outdated versions of the most popular browsers:
<ul>
<li>Internet Explorer 6 SP2 or less</li>
<li>FireFox 2 or less</li>
<li>Safari 2 or less</li>
</ul>
It is designed to be unobtrusive. The message disappears after a few seconds, and it only displays the first time the visitor comes to your WordPress blog/site.
The warning reads: It appears that you are using an outdated version of your browser. Please upgrade your browser for better sercurity and an improved experience.
The message also includes a link where the newest version of the browser can be downloaded.

Dave’s Outdated Browser Warning

Raul Illana

Modifies the body tag classes adding some Platform/Browser/Version codes, so you can add quick and clean CSS patches.
<h4>Inspired by</h4>
<ul>
<li><a href="http://bastian-allgeier.de/css_browser_selector" title="PHP CSS Browser Selector" rel="nofollow ugc">PHP CSS Browser Selector</a> from <a href="http://bastian-allgeier.de" title="Bastian Allgeier" rel="nofollow ugc">Bastian Allgeier</a></li>
<li><a href="http://rafael.adm.br/css_browser_selector" rel="nofollow ugc">JS CSS Browser Selector</a> from <a href="http://rafael.adm.br" title="Rafael Lima" rel="nofollow ugc">Rafael Lima</a></li>
</ul>
<h4>Based in</h4>
<ul>
<li><a href="http://donatstudios.com/PHP-Parser-HTTP_USER_AGENT" title="PHP User Agent Parser" rel="nofollow ugc">PhpUserAgent</a> from <a href="http://donatstudios.com" title="Jesse Donat" rel="nofollow ugc">Jesse Donat</a>.</li>
</ul>
<h4>Available Platform Codes</h4>
Desktop
<ul>
<li>win – Microsoft Windows</li>
<li>lnx – x11 and Linux distros</li>
<li>mac – MacOS</li>
<li>cros – ChromeOS</li>
</ul>
Mobile
<ul>
<li>android – Android</li>
<li>iphone – iPhone</li>
<li>ipad – iPad</li>
<li>blackberry – Blackberry</li>
<li>winphone – Windows Phone OS</li>
<li>kindle – Kindle</li>
<li>kindlefire – Kindle Fire</li>
</ul>
Consoles
<ul>
<li>xbox – Xbox 360</li>
<li>ps3 – PlayStation 3</li>
<li>wii – Nintendo Wii</li>
</ul>
<h4>Available Browser Codes</h4>
<ul>
<li>ie – Internet Explorer</li>
<li>iemobile – IEMobile</li>
<li>firefox – Mozilla, Firefox</li>
<li>camino – Camino</li>
<li>opera – Opera</li>
<li>safari – Safari</li>
<li>chrome – Google Chrome</li>
<li>kindle – Kindle</li>
<li>silk – Silk</li>
<li>lynx – Lynx</li>
<li>wget – Wget</li>
<li>curl – Curl</li>
</ul>

Awebsome! Browser Selector

Empower your CSS selectors! Write specific CSS code for each Platform/Browser/Version the right way.

Dave’s Outdated Browser Warning vs Awebsome! Browser Selector