When possible implement PDF/A-3, this is the new standard in enterprises for the upcoming years.

Closure reason:  
The following versions of PDF/A Standard are implemented: PDF/A-1 (2005), PDF/A-2 (2011), PDF/A-3 (2013).
The feature is live with our latest Q1 2015 release.

Develop Apple/MAC theme

Provide a way to convert any UIElement visualtree to a PDF

With the Windows 10 Anniversary update native controls like TextBox provide this out of the box.

In addition to the fast document generation, the SpreadStreamProcessing can be adapted to import documents significantly faster than SpreadProcessing.

This item has been moved to the Document Processing portal. It can be found here: https://feedback.telerik.com/Project/184/Feedback/Details/251942-spreadstreamprocessing-implement-workbook-import

I want to have opportunity to disable RadExpander header because I want to programmatically expand or collapse RadExpander control.

Similar to File Explorer in Windows 10, it would be helpful to have a Quick Access section in the left navigation pane with the ability to pin frequently used items.

File explorer with the drag and drop upload and just a richer interface

A component to easily chat with visitors on a website.  It's becoming popular to be able to interact and offer support that way.  Maybe based on the Windows Live Components or something along those lines.

Would it be possible to add a new theme that accurately tracks the Google Material Design guidelines?  (http://www.google.com/design/spec/material-design/introduction.html).

Available in the 2017 R2 Release.
More information you can find here: http://docs.telerik.com/devtools/wpf/styling-and-appearance/themes-suite/common-styling-appearance-material-theme

looking the attach file,when resize the second gridview's column moving back and forth when at first run the sample,the after columns flicker and the width grow and lessen.and when resize the third column,the 'unit price' column will become the min width.
but when test the microsoft's datagrid,it is good,the any other column width's change is gentle.

Available in LIB version 2018.1.312.

When you start editing the input control, the watermark text should go on top of it or to the left.

It would be awesome if Telerik created custom OpenFileDialog, SaveFileDialog and BrowseFolderDialog controls/windows/dialogs that would mimic the functionality found in: Microsoft.Win32.

- Differentiate from competition - Create controls that other WPF controls packages don't have
- Allow users to have common styling/views across their application
- Make it so our software doesn't have to reference Microsoft.Win32, we can continue to have a native Telerik solution
- Could make it more intuitive to program with than the Microsoft dialog (with filters, startup folder etc)

Reference post:
http://www.telerik.com/forums/why-is-there-no-openfiledialog-in-telerik

Available in R3 2017 Official Release of UI for WPF.
Check what's new in R3 2017 here: 
http://www.telerik.com/support/whats-new/wpf/release-history/ui-for-wpf-r3-2017

with windows10/2k DPI/14 inch screen ,when show the gridview gridline,the line is different.
     the other things,when the tabitem is selected,the dropdownmenu can't mark the selected item.
   look the attach files!

https://www.telerik.com/forums/printing-3559585fdb4e
https://www.telerik.com/forums/print-bb34c69c1e37
https://www.telerik.com/forums/printing-rasscheduleview-mvvm

I know the Transitioncontrol  have the MotionBlurredZoomTransition, the effect is better for image ,but not UI content,especially when the UI use the simple color,the MotionBlurredZoomTransition effect is weak,I find the RadCalendar control with the cool zoom animation,How to realize?
     the other question:How to realize the book turning animation with the Transitioncontrol  ?