How to import .ascx file in SharePoint 2013?

SmartPart  Webpart is  third party tool avaliable 

Great webpart to convert your user control into SharePoint 2010/2013 web part,

1. Automatic deployment using the SharePoint Solutions Framework
2. Manual deployment by copying and editing a couple of files

 Easy host any ASP.NET user control, basically allowing you to visually design the web part rather than write it in code. I’m sure you will all agree, this is a very useful tool!


http://smartpart.codeplex.com/