Ymark.gif btnXSLogin.gif
http://developer.yahoo.co.jp/other/oauth/loginbuttons.html

twitter-bird-blue-on-white.png
https://twitter.com/logo

m_balloon_icon.png
http://developer.mixi.co.jp/about-platform/policies/image_guidelines/

hatena.png
http://www.hatena.ne.jp/company/logo

f_logo.png
http://www.facebook.com/brandpermissions/logos.php

apps-128.png
http://deployment-ja.googleapps.com/Home/user-resources/google-icons-and-logos

openid_bi2.png
http://www.openid.ne.jp/
