Hi Amir,

Ignite UI has a partial support for RTL.
In order to enable RTL support you need to set the dir attribute to rtl on the element on which control is instantiated.
Example:
<input id="editor" dir="rtl" /> 

Here is the RTL support list by control:
(This list is not official Infragistics data. I've assembled it based on my experience with the controls.) 

igGrid - Partial.  You can add some CSS in order to make it work for you.
igGridPaging - No
igGridSorting - No
igGridFiltering - No
igCombo - Yes
igEditors - Yes
igDialog - No
igDatePicker - Yes
igHtmlEditor - No
igTree - No
igUpload - No
igVideoPlayer - No

Note that the list isn't complete, because I didn't test all the controls.

Hope this helps,
Martin Pavlov
Infragistics, Inc.