The Dextop application framework allows you to create Rich Internet Applications based on .NET/Mono and Sencha Ext JS. It has proven to be useful for online business applications. It features a desktop-like Ext JS frontend, simplified client-server communication, a stateful programming model, real-time updates and notifications from the server, automatic column model generation, automatic store model generation, and automatic form generation.
MixERP is a multi-currency, multi-lingual, and multi-establishment ERP solution. It allows you to operate multiple Office Groups and Offices, and consolidate and/or split reports on the fly, and provides a policy engine for G/L access, integrated workflow engine for transaction posting and verification, automatic decision making based on your configuration, and end of day operation.
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.