PanelManager (nuget): Tabless TabControl aka Panel Manager  Project created based on code on Mick Doherty's Page, to easily add on your projects.  Decription from Mike's page (http://dotnetrix.co.uk/custom.htm#tip2):  I see and hear requests to remove the tabs from the tabcontrol so often that I decided to create a simple Tabless TabControl.  Select a ManagedPanel at design time and you will see a DesignerVerb which allows you to select the PanelManager Control.  You can then change the selected panel via the property browser, so once you're used to using it, designtime is no problem at all.
Keywords: Tabless|TabControl|WinForms|Panel