Below is a list of utilities that I have used or would recomend.

General

1. Audio Switcher
   Allows you to assign hotkeys to switch audio input and outputs
2. HWMonitor
   Monitors various hardware   values on your system like fan speed & tempature etc.
3. Link Shell Extension
   Allows right click functionality in File Explorer for creating NTFS Directory Junctions & symbolic links and more.
4. SourceTree
   Sourcetree simplifies how you interact with your Git repositories so you can focus on coding.
5. SnapIt
   A window manager for Windows 10. Organizes your windows to improve your productivity when working with wide and multiple screens.
6. Open Broadcaster Software
   Free and open source software for video recording and live streaming.
7. SyncBackFree
   Backup, Synchronize, Find, Secure, Delete or Undelete your Windows Files.
8. Paint.Net
   Paint.NET is image and photo editing software for PCs that run Windows.
9. Audacity
   Free, open source, cross-platform audio software.
10. VideoLan Player
    VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols.

Programming

1. LinqPad
   Simple fast programming environment
2. RoslynPad
   A simple C# editor based on Roslyn and AvalonEdit. Alternative to LinqPad.
3. Visual Studio Code
   Code editing. Redefined. Free. Built on open source. Runs everywhere.
4. JustDecompile
   Free. For everyone. Forever. With an open source decompilation engine.

Visual Studio.NET

1. Auto Deploy
   The extension copies files from output directory to specified directory after each build.
2. Codealike
   Have you ever wondered how much time you spent debugging? Automatically track everything you do when you code. See reports and metrics in real-time and never forget again what you did on the code.
3. Devart Code Compare
   File diff tool that reads structure of C#, C++,VB code for better results. Includes: folder comparison tool.
4. DocPreview
   XML Documentation Preview. Generates HTML preview of the code XML documentation from the comment region under the current caret position.
5. GhostDoc
   Generate XML Comments from your code, maintain clean and up-to-date documentation, produce help docs in multiple formats, use intelligent source code Spell Checker in Visual Studio.
6. Jetbrains Resharper
   The legendary .NET productivity tool: find and fix errors and code smells; navigate and refactor; run unit tests and write quality code faster.
7. Match Margin
   This feature highlights all the textual matches of token at the caret location in the Editor.
8. Output Enhancer
   Output enhancer is extension that add styling to Visual Studio output window.
9. Project File Tools
   Provides Intellisense and other tooling for XML based project files such as .csproj and .vbproj files.
10. Solution Error Visualizer
    This feature adds error, warning, and message squiggles to Solution Explorer.
11. WakaTime
    Visual Studio extension to quantify your coding using https://wakatime.com/
12. File Icons
    Adds icons for files that are not recognized by Solution Explorer
13. Automatic Versions 2
    Automatically increments or updates version numbers in a project, based on configurable settings.
14. BuildVision
    A Visual Studio extension to visualize the building process.