Often, working with the Kendo events is difficult, because the events lack any kind of context. For example, the Change event should also pass back OldValue and NewValue, in case you need to do any additional comparative work on your own, without having to figure out how to get back to the DataItem and figure it out for yourself.

Also, if you are handling a Grid row changed event, or cell changed event, at the very least you should be passing the Uid of the row that changed, so I can get it from the data source. 

In the NumericTextBox typing the character "-" is not allowed meaning that the user can not directly type a negative number.  The only way for a negative number to be specified is by clicking the down arrow to progress below 0 to get the dash to show up.

Didn't found Icenium UserVoice, so i am posting this here.

Support for third party plugis for PhoneGap (Which are JavaScript wrapper and Native code (Java/Objective C) for the targeted platform)

For example, if a user wants to use native Facebook login in his hybrid application, he has to use this plugin - https://github.com/davejohnson/phonegap-plugin-facebook-connect which requires some tweaks in the native code.

Without phonegap plugins, Icenium will fall behind the standart dev stack.

Have a way to remove padding from the Kendo Chart. For asthetic purposes some charts need to fill the entire area. Currently all of our area charts just have a straight line that comes up out of the x-axis and it looks like garbage. we need a way to remove the space from where the chart area starts and stops and where the actual area chart is contained. It should also be noted that both high charts and jqueryui charts can do this. Most people purchase kendo so they can have a consistent toolset.

Bubble count on mobile list view like jquery mobile

Create a plugin for Oracle APEX that would allow easy use of dataviz and other widgets

It should be nice if we could set a background color using a gradient for DataViz area charts.

The switch control does not currently support long text labels so only text such as ON and OFF are suitable. 

The widget width will not auto expand according to text length so if you want to use text such as Active or Inactive it is restricted.

While an additional <label> element can be used to describe the control we find that having the action wording within the control an efficient way to display it.

http://i.imgur.com/2ph9BMg.png

Use checkboxes besides the dynamically created items in the legend of the chart without defining a custom legend.

Please see the attached image here :
http://www.telerik.com/forums/can-i-use-checkbox-on-dashboard-tip

I know there are a number of requests for this, and I'm in agreement with all of them. I wanted to post a couple of specific examples in order to make it clear what would save me (a developer using Kendo for production code) time in implementing widgets within our application.

1. Provide information about all aspects of any given topic. For example, I recently tried to understand how sorting works for Grid. (see  http://www.telerik.com/forums/where-is-the-documentation-on-performing-case-insensitive-sorting-for-grid). It seems like it would take a pretty minimal effort to include information in the docs for grid column-header sorting (http://docs.telerik.com/kendo-ui/api/javascript/ui/grid#configuration-sortable) that describe how to turn off case-insensitive sorting, as well as explain that the grid option does not sort data on initial load (for that you need to sort on the dataSource). It required a fair amount of searching, and a couple of days to come to this understanding, which could have completely been avoided by adding a paragraph or two to the docs examples I just mentioned. For any configuration option, or feature documentation, make it complete and describe it entirely.

2. Utilize hyper-linking more effectively within the docs. A while back, I wanted to understand how to fully utilize the numericTextBox widget, and the docs mentioned 'format' for numerics. Unfortunately, I don't know what 'format' means in the context of Kendo widgets. Eventually, I found this forum post: http://www.telerik.com/forums/where-is-documentation-on-format
As I pointed out in my comment in that post, there's simply no reason to require your users to search for what 'format' means, when with minimal effort on your part, a link can be added and I can simply click to that documentation and get the answer I need.

There's a ton of individual examples that fall into one of those two categories, and if those were fixed, about 60% of the documentation issues I encounter would be resolved. I appreciate the chance to express this, and thanks for your consideration.

I believe a kanban board for managing tasks woudl be a great new control.  I see that you have something like this in TeamPulse already.  In the new control it would be nice to set the number of columns, custom template for an item (but providing a template that resembles sticky pad note would be cool) and allow drag/drop between the columns.  The D&D would need to be customizable so that the programmer could restrict which columns an item can move to & from.  This would be needed in case they did not want to allow the user to move an item to a previous state or may only allow to move forward 1 step.  The reason I put this under bootstrap is because the control should reposition columns below based on screen size.  So it may start as a 4 column board but because of the size of the window it is a 2x2.

Kendo has places where you can specify cssSpriteClass, and other places where you can specify the actual icon by name. 

My proposal is to provide a way to say I am using halflings or font awesome or anything else for that matter, and just specify icon "fa fa-play" and its done.

Currently its way too much work to implement kicon wrappers for font awesome fonts, and then they dont work everywhere anyway.

It would be useful to have border configuration as an option when using kendo.ooxml.Workbook to create an excel file (i.e. sheets.rows.cells.border)

Our users love how pretty Kendo UI charts are. We usually visualize data for them with Pie or Bar charts, often in combination with a Kendo UI Grid.
However they almost always want the ability to export what they see in the browser to PowerPoint. One workaround might be to save the Kendo elements to an image and stick that into a PowerPoint slide. However they don't want that. They want a real PowerPoint slides with real PowerPoint charts and grids live objects like they were initially created in PowerPoint. We have managed to implement something to do that with OpenXML, but it will be a HUGE time saver if Kendo does that out of the box.

When exporting a PDF kendo returns a promise that is used to track progress and completion. When exporting to Excel the UI simply locks until the file is ready to be saved.

It would be nice if exporting to Excel worked like exporting to PDF so the UI didn't lock while waiting for the file to process.

I need to display multiple charts on one page. These charts are all based on the same timeserie.
To help with data analysis, I need to align every chart and the easiest way to achive that would be to be able to specify a width for the plot area.

Would you consider adding this feature ?

Microsoft's new Azure Portal uses an innovative UI with "blades" that scroll horizontally to the right. This is a very effective paradigm.

It would be great to have a Kendo UI control (and MVC wrapper) to manage and create these blades

You should be able to define a row template which uses the field templates. E.g. Define a Row wrapper and Column wrapper, so that kendo would automatically use the field template.
Another option would be to define an variable, which you can use to call the field templates.

Menu, ContextMenu, TabStrip, PanelBar, Splitter have append, insertAfter and insertBefore methods.
kendoToolBar has only add, so there is no way to insert new command after/before other command.

Please add methods insertAfter and insertBefore to the kendo.ui.ToolBar widget.

Related forum post:
http://www.telerik.com/forums/insert-item-at-the-beginning

Package kendo ui widgets as ES6 modules