WordPress plugin to suggest (and link up) users to sign up for Gravatar when they comment/register on a WP install.
#avatar
Twitter Avatars In Comments WordPress Plugin
Twitter Avatars In Comments WordPress Plugin
WP plugin that allows you to try loading a Twitter avatar and/or a Gravatar for commenters on your blog.
Flash Crop Admin Tool
Perfect for creating custom avatars for a website based on a URL or upload. Select the part you want and crop away.