Popular and Useful Extensions for Visual Studio

Below is the list of extensions that are useful to have in Visual Studio.

Visual Studio:

Resharper: A must-have for every developer be it C#, JavaScript, HTML, CSS, XAML. It allows refactoring (it can identify loops to be converted to LINQ statements), improves Code Quality, and keeps in check the coding standards.
NuGet Package Manager: It’s a package manager that helps in automating the process of installing/managing packages in Visual Studio Projects.
Web Essentials 2012 and Web Essentials 2013 for Update 2: A must-have an extension for Visual Studio both for 2012 and 2013. It has many features which help to write HTML, JavaScript, CSS
Productivity Power Tools 2012 and Productivity Power Tools 2013: Another extension which provides some nice features to make Visual Studio more productive and helpful while coding
Microsoft Code Digger: It can be used to analyze execution paths and provides you with the behavior of code for each execution path.
Microsoft Visual Studio Team Foundation Server 2013 Power Tools
Git Source Control Provider: Integrate Git into Visual Studio

Web Development:

SideWaffle Template Pack: It adds project templates for web development
Hot Towel Spa (VS 2013) and Hot Towel Spa (VS 2012): Template created by John Papa which can be used as a starting point for developing Single Page Application.
BackboneJS SPA Template: Template to create a SPA with a backbone
Durandal: An MVC4 SPA using Durandal
JSLint.VS2012: It adds support for JSLint in Visual Studio
jQuery Code Snippets: As the name suggest, this extension provides developers with Jquery Code Snippets
TypeScript 1.0 Tools for Visual Studio 2012: Provides features for using TypeScript in Visual Studio
Advanced JavaScript outlining: Provides outlining similar to available in cs files
SharpKit: Write C# and convert it to JavaScript

Others:

CodeMaid: Nice extension for cleaning up the code
WPF MVVM project template: Template which provides a jumpstart for MVVM enabled WPF projects.
Free .NET Excel API: Provides options to create and manage Excel files
Visual Studio Design Patterns add-in: Very very useful extension which provides a jump start to create skeleton code while implementing Design Patterns
Bing Code Search for C#: Allows developers to search right from Visual Studio (currently only available in VS 2013)
Layered Architecture Solution Guidance 2013: An extension which provides various options to create standard project templates like Web Application, Windows, WPF
Entity Framework Power Tools: A must-have tool for anyone working on EF, it allows developers to generate POCO classes from the Database and use that as a Code-First approach