Top 20 NuGet ORM Packages

Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate.
In-memory database provider for Entity Framework Core (to be used for testing purposes).
Shared Entity Framework Core components for relational database providers.
Shared test suite for Entity Framework Core relational database providers.
SQLite database provider for Entity Framework Core.
Microsoft SQL Server database provider for Entity Framework Core.
Entity Framework Core Package Manager Console Tools. Includes Scaffold-DbContext, Add-Migration, and Update-Database.
SQLite database provider for Entity Framework Core.
Cache provider for NHibernate using ASP.NET Cache object. Supports SqlCacheDependency, allowing SQL Server changes to invalidate the cache.
SQLite-Net Extensions is a very simple ORM that provides cascade operations, one-to-one, one-to-many, many-to-one, many-to-many, inverse and text-blobbed relationships on top of the sqlite-net library.
Common library for the Light, simple and fast convention-based code-first POCO, OrmLite. Support for Creating and Dropping Table Schemas from POCOs, Complex Property types transparently stored in schemaless text blobs. OrmLite is a suite extension methods on ADO.NET's underlying IDbConnect...
Shared design-time test suite for Entity Framework Core relational database providers.
Package Description
NHibernate Profiler is a real-time visual debugger allowing a development team to gain valuable insight and perspective into their usage of NHibernate. The product is architected with input coming from many top industry leaders within the NHibernate community. Alerts are presented in a concise code-...
DbExtensions is a data-access framework with a strong focus on query composition, granularity and code aesthetics. It supports both POCO and dynamic (untyped) mapping.
The official collection of get, insert, update and delete helpers for Dapper.net. Also handles lists of entities and optional "dirty" tracking of interface-based entities.
LinqKit.EntityFramework is a free set of extensions for LINQ to SQL and Entity Framework power users. Include(...) and IAsync are supported.
NHibernate Profiler is a real-time visual debugger allowing a development team to gain valuable insight and perspective into their usage of NHibernate. The product is architected with input coming from many top industry leaders within the NHibernate community. Alerts are presented in a concise code-...
The fastest micro-orm extension for Dapper is built around essential features of the C# 6 / VB 14 that have finally raised the simplicity of raw SQL constructs to acceptable maintenance levels. These features leave no chance to mistypings or problems arising from db entity refactorings. It is manda...
Light, simple and fast convention-based code-first POCO ORM for Sql Server. Support for Creating and Dropping Table Schemas from POCOs, Complex Property types transparently stored in schemaless text blobs in SQLServer.