Top 20 NuGet data-access Packages

A high performance, low code alternative to ORM's such as Entity Framework, offers intelligent database mapping to your existing CLR objects with minimal effort. Visit "Design Goals" on GitHub to see more rationale and guidance.
For users of CodexFramework V1.0, this package offers a way to change less code when migrating to use CodexMicroORM as a replacement framework.
A simple and fast database reader for the .Net framework.
An alternative to ORM's such as Entity Framework, offers light-weight database mapping to your existing CLR objects with minimal effort. BindingSupport is net461, supporting two-way data-binding with entities.
Utility library to provide a data access abstraction layer on top of SharePoint.
Simple connection management for ADO.NET data providers.
Simple connection management for ADO.NET data providers. This package provides support for DocumentDB.
Simple connection management for ADO.NET data providers. This package provides support for SQL Server.
Simple connection management for ADO.NET data providers. This package provides support for SQLite.
Simple connection management for ADO.NET data providers. This package provides support for MySQL.
An in-memory implementation of Hektonian.DataSource
An Entity Framework Core implementation of Hektonian.DataSource
A simple domain driven data access library. Sample template and class provided.
Sequelocity.NET is a simple data access library for the Microsoft .NET Framework providing lightweight ADO.NET wrapper, object mapper, and helper functions.
An alternative for repositories.
A simple domain driven data access library.
Silverlight client library to consume the Gofer service.
High-performance ADO.NET object mapper.
A forked version of Massive (by @robconery) compatible with MySql.
A wrapper for the FileMaker Server XML API.