Top 20 NuGet mapper Packages

A lightweight and powerful semantic data access layer for .NET, extremely easy to learn and use.
Simply Data Accesss Layer for EntityFramework with some helpfull features.
Faster Mapper (Transformator) for .NET Core 2 (.NET Standart 2) More: https://github.com/gromanev/LynxMapper
Provides PostgreSQL specific extensions to SqlFun.
Basic Oracle provider for FluidDbClient.
Simple & performant model mapping
Persistence layer for sitecore using glass.mapper
Dwarf is a light weight, highly competent, versatile, easy-to-use O/R-M framework 'that doesn't get in your way'. Configured in the blink of an eye and is packed with features
Cocoon ORM is a simple .NET object-relational mapper alternative to Entity Framework or NHibernate. Cocoon ORM supports SQL Server, and SQL Azure.
Extensions that can be used with AutoMapper
Want a fast .net transform/mapper tool? DecepticonTransformer uses IL Emit (LCG - Lightweight Code Gen) to make fast copy of data from a type to another.
Slazure is a ORM/ODM type data mapper for schema-free NoSQL databases. Slazure automatically maps data entities between your code and the database data model. This package enables Slazure to work with the Microsoft Azure Table Storage.
Slazure is a ORM/ODM type data mapper for schema-free NoSQL databases. Slazure automatically maps data entities between your code and the database data model. This package enables Slazure to work with the Microsoft Azure Table Storage. Contains Slazure Light edition component.
Persistence layer for sitecore using glass.mapper
Map models from one to another.
CoPilot is an object relational mapper (ORM). In its core it works like a micro ORM, but it has some neat and powerful features added on top of it, which makes it more of a "middle ground" ORM. CoPilot is built with performance and flexibillity in mind, and was specifically designed to avoid any lea...
Object Mapping using Fluent, Annotations and Lambda