Top 20 NuGet ORM Packages

ThinkNet integration with EntityFramework.
ThinkNet integration with NHibernate.
Adds SQL statements generated by NHibernate to the Glimpse SQL tab.
A basic wrapper for ADO.NET that uses DbProvider Factories, and a basic OR/M. For a quickstart visit https://www.pengdows.com/2016/02/14/pengdows-crud/
Implementation of generic repository pattern with a few utility methods.
Entity Framework testing library part of Georadix.NET, a framework for building great .NET apps.
A Micro-ORM for Apache Cassandra.
An extension for NHibernate that provides a better flow when, and a safer way of, querying over NHibernate's ICriteria API.
GeoJSON for EntityFramework is a .net library that allows you to create GeoJSON output from EntityFramework Spatial Data or WKT inputs. In other words, It serializes different type of geometry objects to GeoJSON. It's not limited to only EF entities but It can serialize WKT inputs as well. Fe...
Tool to add INotifyPropertyChanged support to NHibernate's proxies, enabling their usage with WPF for example.
A scalable way of composing EntityFramework type configuration classes using MEF.
EFAutomation is a convention based extension library for Entity Framework to automate several tasks currently cumbersome to do. It allows developers to create an Entity Framework based Context without having to specify each entity by putting it as DbSet<> as property.
A library that extends the functionality of Entity Framework 6 by adding batch update, future queries and audit logs.
A library that extends the functionality of Entity Framework 5 by adding batch update, future queries and audit logs.
Provides Vertica 7 integration with NHibernate.
JSON ORM is an open source very lightweight framework developed on top of json.net. The Idea is to make json more quickly and easily implementable manage local storage as json.
Extends NHibernate's high-low key table to provide indexes per entity. Compatible with Firebird, SQLite, SQL Server 2000-2012, SQL Server CE, Oracle, MySQL and PostgreSQL.
A lightweight CRUD wrapper for the Dapper Micro-ORM.
MongoCamp for MongoDB ORM Tools (based on the official driver)
An updated version of the NCommon extensions for ASP.Net MVC