Catharsis.NET.Domain is a .NET library which provides commonly used types of domain business entities such as articles, blogs, comments, downloads, and a FAQ to speed up the development of typical business applications. It includes domain entity types declared as partial classes (can be extended if necessary), a set of common domain-related interfaces, like INameable and ITaggable, and a set of extension methods for IEnumerable/IQueryable sets of domain entities.
Catharsis.NET.Web.Widgets is an ASP.NET MVC tag library that provides useful social media widgets that be be included on your Web pages. Web widgets are implemented as C# POCO objects that implement System.Web.IHtmlString and provide a convenient fluent interface. Extension methods for System.Web.Mvc.HtmlHelper are provided for ease of rendering. It supports Cackle, Disqus, Facebook, Google, IntenseDebate, Mail.ru, RuTube, Surfingbird, Tumblr, Twitter, Vimeo, VKontakte, Yandex, YouTube, and the VideoJS player.
Catharsis.NET.Commons is a library of extensions for many common .NET types. It can significantly speed up your daily .NET development tasks, relieving you of writing boilerplate code. It implements the popular fluent-kind interface approach and allows many tasks to be performed in a single line of code with joined method calls.
LastFmLib.net lets you access all Web services provided by Last.fm. This also includes an implementation of the Audioscrobbler 1.2.1 submissions protocol and radio api. Also, LastFmLib.net provides a set of useful classes, e.g for caching requests and pictures and for accessing simple request easily via the LastFmClient class. The library should be fully Mono compatible (the test with MoMa was positive).