See http://okapi.opentag.com/ for LATES VERSION of the Okapi Framework
THIS VERSION ON SOURCEFORGE IS NO LONGER SUPPORTED and works only on Windows. The Okapi Framework is a set of components and tools for localization and translation tasks. THE NEWEST JAVA-BASED VERSION OF OKAPI IS AVAILABLE AT: http://okapi.opentag.com/ The new version runs on Windows, Mac, Linux, etc.
Enterprise Service Bus framework tailored to the .NET platform. Excellent .NET application server as well.
OmniPortal was built on the idea of having a web-portal-kernel, that could handle security, themeing, and localization. This means that you can create any web based system on top of OmniPortal (i.e. ERP, CMS, CRM) easily. Mono and .Net is supported.
TDO - Typed Data Object is a .NET source code generator (C#/VB) for data layers based on Microsoft SQL Server 2000/MSDE/2005/Express. TDO allows .NET Framework 2.0 developers, to have the source code automatically generated for MS SQL Server databases.
ManagedFusion was built on the idea of having a single Web-Portal Core, that handles modules, security, themeing, and localization. A CMS, ERP, or CRM can be easily created with this powerful framework. Mono and .Net are supported.
PLiX (Programming Language in XML) is an XML-based code-generation framework. Generators produce XML matching the PLiX.xsd schema, which can be formatted into multiple languages. Extensible formatters support C# and VB.NET in Visual Studio 2005 and 2008
KAYM - Knowledge Management
ReCurser is a plugin-driven desktop application written for the .NET framework which allows batch file renaming, mp3 tagging, searching, file system reporting, media cataloging, and more.
Webstensible is an extensible application layer for building robust, web-based business applications. The framework is written in DotNet. All components are loaded via reflection and designed to be replaced to match ever-changing business requirements.