Microsoft Enterprise Library

The Microsoft Enterprise Library is a collection of reusable software components (application blocks) designed to assist software developers with common enterprise development challenges(such as logging, validation, data access, exception handling, and many others)).

License: Ms-PL
Written in: C#
Operating system: Windows

Website: http://entlib.codeplex.com/
Download: http://entlib.codeplex.com/releases/view/43135
Documents: http://entlib.codeplex.com/wikipage?title=EntLib%20FAQ&referringTitle=Home