I’m currently working on assembling a NuGet package containing a full set of my utilities for WinJS. In the meantime, you can get a few of the ones I’ve shared via this blog using the links below:
Contains a set of binding initializers I found useful.
A toggle switch which can be data-bound to a local or roaming setting value.
A helper which mimics WinJS.xhr but uses WinRT’s HttpClient underneath.
My Visual Studio Item Template for creating optimized custom controls