- TemplateBuilder
A NuGet package which can be used to easily create item and project templates for Visual Studio. Source code available at GitHub. - SideWaffle Template Pack
Contains both item- and project templates suitable for building websites, Windows apps, Windows Phone apps, WPF, Visual Studio extensibilty project and a lot more. Source code available at GitHub. - Visual Studio Extensibility Templates
GitHub repo that contains item templates that help you develop Visual Studio extensions.