LightBox is a ve very nice script can be used for overly images. It deliver beautiful and profssional client side amination of images without coding. You can use it for any of your image gallery.
Html Agility Pack is a .NET code library that allows you to parse “out of the web” HTML files very smartly.
Argotic Syndication Framework is a powerful and extensible .NET web content syndication framework for RSS, Atom, OPML, APML, BlogML, RSD and more. And this is very easy to use.
Text Template Transformation Toolkit is a library of code generation templates for Visual Studio.