Top 20 NuGet ORM Packages

TypeSql compiles annotated SQL into strongly-typed data-access-objects
FastData is a simple and fast .NET micro ORM that can be used as ultra-fast data access layer of high-performance .NET projects.
Provides basic support to ease communicating with NHibernate backed repositories
Luna is open source and freely downloadable automatic code generator to facilitate and standardize the writing of classes that save data to database. The code is generated in VB.NET or C# language and can be used in both Desktop and Web application. Luna project start from 'need to write in an optim...
Simple micro-ORM for SQL Server, with first-class support for dynamics and async/await
An extension to the original NCommon framework (available at https://github.com/riteshrao/ncommon) with a focus on better EF 5 integraiton and instrumentation with the MVC Mini Profiler.
Squickl is a .NET library that simplifies access to SQL data sources when you don't want or need an ORM.
An update/extension to the NCommon data adapter for Entity Framework.
Domain Driven Design Repositories
The woozle model generator creates POCO classes of your edmx model including additional features such as multi tenancy or managed concurrency.
The woozle entity framework repository and unit of work generator creates repository and unit of work classes of your edmx model which can be used to perform database operations. The generator includes additional features such as including additional features such as synchronizing an object to the e...
EF Context with injectable actions
Audit log extension for Entity Framework 6
Silky smooth .NET wrapper for NHibernate.
Allows SQL Server Compact 3.5 to be used with Entity Framework. Requires the SQL Server Compact 3.5 SP2 runtime to be installed.
Helpers and convenience methods for pulling data out of `IDataReader`s
Database ORM Mapping Library
A high performance Micro-ORM supporting Sql Server, MySQL, Sqlite, SqlCE, Firebird etc..
NHibernate with async support, works on .net 4.5.2
EntityFrameworkExtras provides some useful additions to EntityFramework such as executing Stored Procedures with User-Defined Table Types and Output Parameters. github: https://github.com/Fodsuk/EntityFrameworkExtras (See Changelog!)