I have been preparing the next release of my re-usable VM for SharePoint 2010 development that is used by all the developers at Orangutech. I decided to add a few extensions that would make development tasks easier and found quite a few interesting ones so I figured I would list them here. Hope you will find these useful in enhancing your productivity.

Here are the extensions:

Visual Studio 2010 SharePoint Power Tools
Templates and extensions that provide a sandboxed Visual Web Part together with enhanced support for sandboxed compilation to help you develop SharePoint solutions even more productively.
Mavention SharePoint Assets Minifier
Installs custom tools for minifying SharePoint assets such as JavaScript and CSS files.
CKS – Development Tools Edition (Server)
The SharePoint 2010 Visual Studio 2010 Extensions project (CKSDEV) is a collection of Visual Studio templates, Server Explorer extensions and tools providing accelerated SharePoint 2010 development based on Microsoft’s new SharePoint 2010 development tools.
Free Taxonomy Editor For SharePoint
Dotspine provides you a graphic modeler to easily design and populate taxonomy tree. Then you can export them as XML files to be proceeded by PowerShell and target SharePoint 2010.
Provides enhanced IntelliSense support for the Collaborative Application Markup Language (CAML) used by SharePoint.
SharePoint Timer Job Item
A SharePoint project item for creating timer jobs that have an associated configuration screen in Central Administration
The MP.SPDevExt Visual Studio 2010 Extensions project is a collection of Visual Studio item templates used to expedite the SharePoint 2010 development. It contains following item templates: Custom Field Type, Sandbox Solution Validator and Sandbox Workflow Action
Silverlight SharePoint Web Parts
An extension for adding Silverlight web parts to SharePoint features.
Visual Studio 2010 Productivity Power Tools
(Not specifically SharePoint) A set of extensions to Visual Studio Professional (and above) which improves developer productivity.
Web Standards Update for Microsoft Visual Studio 2010 SP1 (CSS3, HTML5)
(Not specifically SharePoint) Adds CSS3 support and updates the HTML5 intellisense and validation including new JavaScript API’s
LINQ to SharePoint DSL Extension for Visual Studio 2010
This new feature is an extension to Visual Studio for modeling LINQ to SharePoint entities directly in VS2010. With this tool, it’s become possible to add a new kind of item in a VS project, that we name a LINQ to SharePoint schema.
(Not specifically SharePoint) CodeMaid is an open source Visual Studio extension to cleanup, dig through and simplify our C#, C++, XAML, XML, ASP, HTML, CSS and JavaScript coding.
Imtech Create Page Layout Content Type Extension
Installs a Content Type Extension that allows you to generate a Page Layout from an existing Content Type.
PowerCommands for Visual Studio 2010
(Not specifically SharePoint) PowerCommands 1.0 is a set of useful extensions for the Visual Studio 2010 IDE.