MonoX is an easy to use CMS and Social Networking Platform for ASP.NET, built on top of the Web Parts framework. Due to its rich feature set, standards compliance and easy deployment, MonoX portal engine is ideal for small and medium size business. Additionally, it also supports multiple caching scenarios, support for responsive design and advanced personalization, portal networks, provider-based infrastructure, cloud data storage and similar enterprise-level features. It is available free of cost for both commercial and non-commercial usage. MonoX comes with more than 50 core Web parts and a complete infrastructure that allows .NET developers to customize both front-end and functionality of their applications. Its key features include: interactive user interface compatible with modern Web browsers, full support for the ASP.NET Web parts framework, a fully featured set of components needed to build advanced social environments, standards compliance, SEO features, scalable and robust architecture, standardized plug-and-play modules and open API, high performance and a flexible data layer and unprecedented ease of use. Non-technical users can administer most of the aspects of the working portal. MonoX employs standard WYSIWYG editors, file manager mimics the look and feel of the standard Windows explorer, etc. It fully supports offline editing tools based on MetaWeblog API, including Microsoft Windows LiveWriter.