I've ported over my app from Windows Phone 7/8, but now I've found myself at a loss of functionality without your textboxes available as universal controls. RadTextBox, RadPasswordBox, and RadNumericUpDown are all controls that would be fantastic if they could be ported over to Universal.

Thanks!

Create Universal RangeSlider control with unified API for WP8.1 and Windows 8.1

A control that is able to display PDF files natively in Universal App 

Port Image editor from Win 8.1 supporting different form factors.

Make the Grid universal.

Create RadRateAppReminder universal control like in UI for Windows Phone 

Make RadDiagnostics Universal control.

The one that's already in win8 phone and UI for WPF. 
Please please

Port ConversationView to Windows Universal

Port the Windows Phone ImageEditor to WinRT.

http://www.telerik.com/products/windows-phone/overview/all-controls/image-editor.aspx

Port the Windows Phone ImageEditor to WinRT.

http://www.telerik.com/products/windows-phone/overview/all-controls/image-editor.aspx

Please add an optional placeholder text for the RadAutoCompleteBox that is shown in a light style and disappears when the control gets focus / has content.

This feature seems to be available for the RadAutoCompleteBox for HTML, but is missing for the C# / Windows Universal version.

A control that is able to display PDF files natively in Universal App

An outlook bar component similar to what is available in UI for Silverlight.

Allow UWP to use Gantt charts similar if not better than the ones used in WPF

It is possible yet to set the value of those Pickers to NULL, but you have to add an additional button yourself that sets a property to NULL. would it be possible to include this functionality in the control itself: some other editfields show a cross, when pressed the content is cleared. also in the flyout, adding as single additional button would be useful. using the DEL keystroke for keyboard access is then also required.