Quick Favicon makes it easy to set up icons for your WordPress site. Favicons! iOS Icons! Android Icons! Windows 8.x Tiles! And more!
Browse and select photos from any public or private Google+ album and add them to your posts/pages.
ER Windows 8 Meta Addon allows you to add your logo with a customized background as tile to Windows 8 Metro just like any application.
Insert a tiled background image into your wordpress template