Adapdev.NET

Adapdev.NET is a robust enterprise framework that supplements the MS.NET framework. It's the foundation of Codus and Zanebug providing the underlying code generation and unit testing engines. It also provides a powerful object caching engine with cache purging strategies, a single API for sql generation, utility methods for encryption and serialization, reflection caching and tons of other features.And, it's free!
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Codus

Codus is a feature-rich object relational mapper. In seconds, it creates all the code you need to interact with your database. Additionally, it creates a full set of unit tests, strongly-typed collections, and web services.
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Elementary

Elementary is a an Object Relational Mapping framework that makes ORM capabilities extremely simple to use. It supports mappings via both Xml files and .NET Attributes and provides many advanced ORM features.And, it's free!
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Zanebug

Zanebug is an advanced unit testing tool. In addition to providing a great UI and working with all versions of NUnit, it provides comprehensive performance metrics and several additional features such as run-time editing of test attributes. And, it's free!!
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