Top 20 NuGet Database Packages

Library for merging a Data-tier Application Package file (dacpac) with and existing database
Wrapper for Microsoft.SqlServer types
SmartSql = MyBatis + Cache(Memory | Redis) + ZooKeeper + R/W Splitting +Dynamic Repository ....
The SQLiteDB_dotNET Class Library is a high level wrapper around the SQLite. The library is currently compiled at .Net 4.0 so it should work with any application running .Net 4.0 and above.
SmartSql = MyBatis + Cache(Memory | Redis) + ZooKeeper + R/W Splitting +Dynamic Repository ....
Microsoft Azure DocumentDb repository classes.
Mini-Biggy is a Very Fast Document/Relational Query Tool with Full LINQ Compliance. This package adds storage for Azure Blobs.
This package contains binding extensions for Cosmonaut's CosmosStore for Azure Cosmos DB.
the abstraction implementation for EF Core.
NHibernate Core database provider for Incoding Software
[Data access for Oracle] Wheel provides a standardized way to use basic infrastructure services (logging, configuration, dependency injection, command system, database access, etc) on .NET console and web applications. This package is the implementation of Wheel.Data for Oracle databases.
An abstraction layer for access to databases, execution of stored procedures, and configuration of EntityFrameworkCore DbContext classes. See Wheel.Data.PostgreSql, Wheel.Data.SqlServer and Wheel.Data.Oracle for implementations on particular database systems.
Kotas utilities - a library for data access via native connection (SQL)
An implementation of the Tcl scripting language.
A high performance and powerful ORM framework supporting SQL Server, MySQL, Oracle, PostgreSQL, Sqlite, SqlCE etc..