A curated collection of awesome LINQ libraries, tools, and more. The goal is to build a categorized community-driven collection of very well-known resources.

Inspired by awesome-dotnet, awesome-regex and the whole awesome-* trend on GitHub.

Sharing, suggestions and contributions are always welcome! Please take a look at the contribution guidelines and quality standard first. Thanks to all contributors, you're awesome and wouldn't be possible without you!

• LINQ to Bing - LINQ provider for Bing search API engine
• LINQ to CSV - Popular, easy to use library to read and write CSV files (by @mperdeck)
• LINQ to DB - Linq to database provider (by @linq2db)
• LINQ to Excel - Retrieve data from spreadsheets by using LINQ (by @paulyoder)
• LINQ to Google - Query Google's Data Sources using a strongly typed syntax
• LINQ to JSON - Part of the lib Newtonsoft.Json.NET (by @JamesNK)
• LINQ to REST - Parses OData system query parameters to create a LINQ query
• LINQ to SharePoint - Query SharePoint lists using familiar LINQ syntax
• LINQ to Twitter - LINQ Provider for the Twitter API (by @JoeMayo)
• LINQ to Wiki - .Net library to access MediaWiki API (by @svick)
• LINQ to XSD - LINQ to XSD enhances the existing LINQ to XML technology

• ExtraLINQ - Extension methods for various .NET sequence types (by @mariusschulz)
• i4o (index for objects) - Indexed LINQ - Extends LINQ to allow you to put indexes on your objects
• LINQKit - Extensions for LINQ to SQL and Entity Framework power users (by @scottksmith95)
• LINQ Extensions - LINQ extensions for .NET is a collection of useful extensions methods that extends LINQ's capability. There are methods for combinatorics, mathematical sequences and others Array/IEnumerable extensions. (by @TommasoScalici)
• LINQ Extensions Library - Statistical analysis, sequence generation and manipulation, pattern detection and more
• Mono.Linq.Expressions - Complement for System.Linq.Expressions (by @jbevain)
• MoreLINQ - Extensions to LINQ to Objects (by @morelinq)
• Linq.Extras - Extensions to LINQ to Objects, and utilities to manipulate lists and comparers (by @thomaslevesque)

• RavenDB - A linq enabled document database for .NET (by @ravendb)

• L2ST4 – T4 based code generation to replace the default code generated from the DBML file with LINQ to SQL
• LINQ IQueryable Toolkit - Build your own LINQ provider written by the mind behind LINQ to SQL
• ReLinq - Create full-featured LINQ providers. ReLinq is used by EF 7 and NHibernate
• LINQBridge - Complete re-implementation of LINQ to Objects for projects targeting Microsoft .NET Framework 2.0

• LINQPad - An awesome tool to test and prototype LINQ queries.
• Linqer - Convert SQL query to LINQ
• LINQ to Entity query visualizer - View Native SQL of LINQ to entities ObjectQuery in Visual Studio

• 101 LINQ Samples - Sample covering all LINQ functionality and demonstrating LINQ with SQL, DataSets, and XML
• LINQ - Sample Queries - This project contains about 101 samples using LINQ

• 10 LINQ Myths - Ten root causes of the most common misunderstandings
• SQL queries in LINQ
• The 6 best practices for writing LINQ extension methods (by @kbilsted)
• Why LINQ beats SQL

• LINQ for Beginners - Let's see some examples, and explore what LINQ does for us (by @exceptionnotfound)
• LINQ: Test-Driven Learning - Help the user further study LINQ with a test-driven approach (by @MartinChavez)

• LINQ Quiz - Take the following short quiz and test your knowledge of LINQ!

• CLinq - LINQ support for the C++/CLI language
• go-linq - .NET LINQ-like query methods for Go (by @ahmetalpbalkan)
• hxLINQ - An implementation of LINQ in Haxe (by @andyli)
• Jinq - LINQ-style queries for Java 8 (by @my2iu)
• LINQ in JavaScript - Use ES6 iterators for proper lazy evaluation (by @aaronpowell)
• Linq - LINQ for list comprehension in C++ (by @pfultz2)
• Linq - Objective-C implementation of LINQ (by @RyujiSamejima)
• LinqToObjectiveC - Brings a Linq-style fluent query API to Objective-C (by @ColinEberhardt)
• linq - PHP implementation of LINQ 2 Objects (by @fusonic)
• linq - LINQ support for Go (by @zx48)
• linqts - LINQ for TypeScript (by @kutyel)
• linq.js - LINQ for JavaScript library packaged for node.js (by @mihaifm)
• linq4j - A port of LINQ (Language-Integrated Query) to Java (by @julianhyde)
• node-linq - LINQ for node (by @contra)
• SINQ - LINQ for Swift - Swift Integrated Query (by @slazyk)
• Pinq - PHP Integrated Query, a real LINQ library for PHP (by @TimeToogo)
• YaLinqo - Yet Another LINQ to Objects for PHP (by @Athari)

You may want to look to awesome-dotnet by @Quozd, awesome-dotnet by @Valien or awesome-test-automation (C# section) by @atinfo. Also .NET libraries that make your life easier by @tallesl deserves a mention.

Other amazingly awesome lists can be found in the awesome-awesomeness list, the awesome list or if you want more lists.