Fumiki Takahashi

TAROSKY INC.

This plugin will show notification for old browser, Internet Explorer.
Go to “Setting” > “Reading” and customize the message, URL, and labels.
To check the look and feel in your modern browsers, add query parameter to the URL <code>ie=true</code> e.g. <code>https://example.com/?ie=true</code>

Taro Browser Happy

A WordPress plugin to display notice to old browsers.

Bhuwan Bdr. Rokaha

Web Experts Nepal

CSS3 is probably the hottest trend in web design right now but Unfortunately, it’s not a surprise that Internet Explorer, 
Implement css markup that support CSS3 “border-radius( Rounded box corners )”, “box-shadow( Dropdown/Inner Shadow )” and 
“linear-gradient( Gradient background color )” in IE versions 7 to 10
This plugin add a IE support markup on main style of your theme. This markup is an IE attached behavior, when applied to an element, allows IE to recognize and display a number of CSS3 properties. This is developed by “Jason Johnston” 
he called it PIE(Progressive Internet Explorer).
The markup support numbers or CSS3 properties but this plugin can only support specific properties: 
* CSS3 Transitions 
Support on Safari, Chrome, Firefox, IE9 + 
Effect of transitions are between .2 and .3 seconds in duration, so they shouldn’t cross the line between nice and distracting; however, depending on the colors used in your WP theme.
<ul>
<li>box-shadow</li>
<li>border-radius</li>
<li>linear-gradient 
Support for all browsers</li>
</ul>
If you have problems with the PIE behavior not being applied, check your server configuration and if possible update it to use the correct content-type. For Apache, you can do this in a .htaccess file: 
– AddType text/x-component .htc
<h3>Plugin Name</h3>
Contributors: Bhuwan Roka 
Tags: ie, intener explorer PIE , CSS3, CSS, transitions, support, oldversion, 
Requires at least: 3.0.1 
Tested up to: 3.9 
Stable tag: 2.0.1 
License: GPLv2 
License URI: http://www.gnu.org/licenses/gpl-2.0.html

WEN's IE CSS3 Support

gradient, CSS3, support, ie, radius, transitions, ie8, css3, oldversion of ie, effects, smooth, automatic, ie7+, border- gradient, box-shadow Requir …

Taro Browser Happy vs WEN's IE CSS3 Support