Top 20 NuGet query Packages

An useful EntityFrameworkCore interceptor to find long running queries against the database. Apart from using any profiler, it will log an error (or anything depending on the configuration) if the specified threshold exceeded.
MySQL Helper to build queries or using entity models to interact with the database.
This is a simple library that is used to run MySql Commands (and SQL). It uses reflection in order to map the results to the specified Data type.
Alternative approach to web api creation. Use CQRS + ES + DDD to create reliable web apps.
An extension package which contains validation handler and default validators.
BigQuery data provider for Stimulsoft products.
Dynamic Linq Query Builder base on Expressions (core). Excellent PrepareQuery method with QueryParams
QueryScope was inpired by the gem has_scope for Rails. QueryScope will filter any IQueryable<T> based on the current request variables and any custom named scopes applied.
Way to manage parameters after hash(#) and access query string in single page web applications.
Core libs of DotQuery, a lightweight query result caching framework for .NET
A collection of useful LINQ extensions
Provides an easy way to abstract a data object model into a projection object model, that can be exposed to external consumers (WCF services, assembly consumers, REST APIs, etc.) without exposing data model information in order to filter, sort and transform query results.
Arg.js gives you quick and easy access to parameters in the URL.
Command Query Responsibility Segregation (CQRS) pattern interfaces.
Extensions to ADO.NET Connections. Reading SQL Query from Resources.
An extension to the Microsoft SQL Server Compact Edition client library, which simulates the support of the multiple statements in a single command.
LightBus is a lightweight in-process bus.
Query helpers and extensions.
A tool for managing connections, transactions, and data readers.
REST Query Language (RQL). A simple, extensible query languaged for REST API's.