Useful extenssioins for Visual Studio

SQL
Entity Visualizer – Entity Framework Debugger Visualizer to display SQL source code generated by Entity Framework.
Entity Developer for LINQ to SQL – is a powerful ORM designer – modeling and code generation tool for LINQ to SQL.

C# WPF
WPF Office 2010 Silver Theme – Office 2010 theme for official Microsoft WPF controls

Time Tracking
VSJira – adds tools to the IDE to interact with JIRA servers.

Scrum Sprint Monitor  – Scrum Sprint Monitor provides the Agile team with hands-off, always up-to-date status of the current Sprint, both at the individual and team level.

Code Style
Indent Guides  – Adds vertical lines at each indent level
Editor Guidelines – Adds vertical lines at each indent level
Indent Guides Spell Checker – Adds vertical lines at each indent level

Visual StyleCop - Adds tool for cleaning of code, insertion 'copyright headers' and etc

Snippet Packs
JavaScript Snippet Pack – A snippet pack to make you more productive working with JavaScript. Based on the Atom snippets.
jQuery Code Snippets – 130+ jQuery code snippets
Gister – extension for directly pushing code snippets to gists.GitHub.com
HTML Snippet Pack – A snippet pack to make you more productive working with HTML.

Languages Tools
Language Convert  – plugin that allows you to convert VB.net code to C# code and back.
Lua Language – provides syntax highline for Lua, debugging, error checking and outlining
Highlighter for Visual C++ 2010  – Its main purpose is to use the new Intellisense database for C++ solutions to change the font color that is used for various different C and C++ code constructs, such as macros, classes, typedefs, interfaces and enums. Also highlights HLSL and GLSL code.
PVS Studio – static code analyzer for C, C++, C#
NVIDIA Nsight Visual Studio Edition – extension for working with GPU. Is supported debugging HLSL/GLSL Shaders (is needed Nvidia GPU), have memory checker, is supported viewing gpu memory, frame tracing, profiling, monitoring GPU utilization
EditProj – This package allows you to edit project files without the need to unload them first.
Web Compiler – A Visual Studio extension that compiles LESS, Sass, JSX, ES6 and CoffeeScript files.
GhostDoc – GhostDoc is a Visual Studio extension that automatically generates XML documentation comments for methods and properties based on their type, parameters, name, and other contextual information.
VS.php – VS.Php is a PHP integrated development environment based on Visual Studio. With VS.Php you can design, develop, debug and deploy PHP applications within the Visual Studio IDE.
PHPLanguageSupport – This extension provides basic editing features for the PHP scripting language
TypeScript184forVisualStudio2015 – no comments
VC++ for Linux Development – no comments
Browser Reload on Save  – no comments
CodeMaid – CodeMaid is an open source Visual Studio extension to cleanup and simplify our C#, C++, F#, VB, PHP, PowerShell, R, JSON, XAML, XML, ASP, HTML, CSS, LESS, SCSS, JavaScript and TypeScript coding.
Cppcheck add-in –  Cppcheck is a C and C++ source code static analysis tool.
C++ Quick Fixes  –  Extenssion what provides db with quickfixes(for example - adds std:: to string)
DoxygenComments – Visual Studio Editor extension that highlights Doxygen documentation tags inside C++, C# and JavaScript comments
SpeedTrace Pro - Profiler and Tracer for .Net  – no comments
.NET Obfuscator - Dotfuscator  – no comments
Visual Memory Leak Detector for Visual C++  – no comments
.NET Portability Analyzer  – no comments
Breakpoint Generator  – no comments
C/C++ #include hierarchie viewer  – no comments
CodeScan – Code Scan will assist you in identifying and mitigating potential vulnerabilities in your projects.
JSON to C#  – Generate c# classes from JSON
dotMemory  – Smart and reliable .NET memory profiler that helps you optimize memory usage in your application, find memory leaks, and fight other types of memory issues.

JSON Schema Generator  – Create JSON schemas directly from a JSON file
ArrayPlotter  – Array visualization within the debugger for C#/C++
.NET Memory Profiler  – no comments
dotCover  – An extremely easy-to-use .NET unit testing and code coverage tool for .NET Framework and Silverlight applications. Integrates with Visual Studio and ReSharper.
Build Version Increment Add-In Visual Studio for .NET  – An addin for Visual Studio to auto increment build versions of projects

Tools
Code Compare – free replacement Araxis Merge for me. Supported folder/file comparison and merging + integration with VS
Automated Build Studio – is a release management system that provides an easy and visual way to automate the software development and deployment process.
MercurialToolbar  – Adds a toolbar to Visual Studio 2010 containing commonly used Mercurial commands.

Git Flow for Visual Studio – no comments

Qt Visual Studio Tools  – no comments
Team City CI – no comments

Installers and Publishing
Visual & Installer – Visual Studio extension for creating NSIS and Inno Setup installers. It integrates NSIS (Nullsoft Scriptable Install System) and Inno Setup with Microsoft Visual Studio IDE and allows you to create and build NSIS and Inno Setup projects right within Visual Studio.
Visual Studio Dependencies Manager  – Managing the binary dependencies is a feature which is not integrated in Visual Studio. However, it's a real problem when doing team development.
SharpSetup – SharpSetup builds around Wix and allows you to create multilingual installers, use VS dialog/control designer to edit installer GUI, create deployment logic in C#/C++ and more.

InstallShield  – no comments