Top 20 NuGet universalapps Packages

Control to provide page-like navigation with FlipView
Custom navigator control that adds new event model and page features
Helper methods, bindings, and animations
helpers that simplify background task integration for WinRT apps
Control to show progress indicator on a page or globally in the application
Control for managing an extended splash screen in WinRT apps
helpers and bindings for dates
control to manage ListView layouts in your markup instead of code
Wrapper for communication between main code web workers or iframes
run custom scripts in a isolated sandbox
Helpers for WinRT applications
Control for showing page flyout on Windows Phone. Usefull for implementing searchbox, custom menus, etc
Tab control based on html fragments
search engine to index and search content locally
navigation control in a side flyout
control implementing semantic zoom interface. It's usefull for wrapping custom controls in a SemanticZoom control
Control to display items in a grid way (horizontal or vertical). Supports several layout options
custom Hub Control relying on WinJSContrib navigator control
Control and css framework for handling data forms with validation
Helps manage datasources with grouping and provide a control to wrap listview with grouping and semantic zoom