gsymes 

Includes libraries for sending growl notifications from your applications (functionality as in the .NET SDK). Also includes a helper class to enable sending of simple notifications with just one line of... More information

Easily adds 'Sexy Bookmarks' to any site. Add Links with @SexyBookmarks.ShareLinks() Fully customizable and themable.

Helper for adding a Google Plus One Button. As simple as calling Google.PlusButton() Intellisense (XML) Documentation included in package. Very easy to customize and use.