Top 20 NuGet orm Packages

A lightweight, fast, convenient micro-ORM that allows you to get objects in and out of your database with the most control and least overhead.
A high performance Micro-ORM supporting SQL Server, MySQL, Sqlite, SqlCE, Firebird etc..
PetaPoco is a tiny, single file .NET data access layer inspired by Massive that works with both non-dynamic POCO objects and dynamics. This package includes the just the core PetaPoco library (ie: no T4 templates)
MySQL provider for Entity Framework Core
NHibernate is a mature, open source object-relational mapper for the .NET framework. It is actively developed, fully featured and used in thousands of successful projects.
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.
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...
A high performance Micro-ORM supporting SQL Server, MySQL, Sqlite, SqlCE, Firebird etc..
PostgreSQL/Npgsql provider for Entity Framework Core.
LINQ to DB is a data access technology that provides a run-time infrastructure for managing relational data as objects.
T4 templates to generate data models for LINQ to DB SQL
The Dapper SqlBuilder component, for building SQL queries dynamically.
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.
PetaPoco is a tiny, single file .NET data access layer inspired by Massive that works with both non-dynamic POCO objects and dynamics. This package includes the core PetaPoco library + T4 templates to generate POCO classes from your database
Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate.
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.
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.
The SQLServer, ODBC, and OLEDB providers for Insight.Database. These are automatically included in the Insight.Database package, except the ODBC provider for .NET Core 2.0, which is in Insight.Database.Providers.Odbc.
Abp.EntityFramework.Common
LINQ to DB is a data access technology that provides a run-time infrastructure for managing relational data as objects.