Google Chrome Frame (GCF) for Wordpress Admin / Backend. Dual Mode Plugin, can be used as a standard Plugin or as a Must-Use Plugin.

No IE Welcome allows you to inform Vistors of a specified IE Version to Update their Browser. Also a different Theme can be used for these Visitors.

Nice and simple plugin that informs a visiter that they are are using an old non-compatible browser if they are using Internet Explorer 6. It displays this in a banner at the top of your blog with a few different options of upgrading to firefox and more.