lupomontero

This plugin replaces the contents of your site with a message asking your 
visitors to use a better browser if they try to browse your site with Internet 
Explorer 7 or earlier.

No IE

'No IE' blocks visits from Internet Explorer 7 and earlier and displays a nice message with a list of better browsers.

alencvitkovic

This plugin identifies if a visitor is using Internet Explorer 6 (or older) and suggests to upgrade to a recent version or to install another web browser.
Info: 
If you have WP Super Cache or some other cache plugin installed it’s very possible that Stop IE6 will not work properly. I’ll try to fix that ASAP.
Please take a few seconds of your time and rate this plugin. Thank you!

Stop IE6

This plugin identifies if a visitor is using Internet Explorer 6 (or older) and suggests to upgrade to a recent version or to install another web brow …

No IE vs Stop IE6