Takis Bouyouris

This plugin adds a magic sidebar which you can fill with widgets and a widget that displays the magic sidebar’s contents as tabs. Sounds more complicated than it really is!

Tabbed Sidebar Widgets

Pack multiple sidebar widgets into one convenient tabbed container.

SlipFire

Steve Bruner

This plugin is not actively supported anymore.
The easiest way to add a tabbed content area in your sidebar.
If you can use widgets… then you can use this plugin. 
(Of course, your theme must support widgets)
Want to see what it looks like? Check out the <a href="https://wordpress.org/extend/plugins/tabber-tabs-widget/screenshots/" title="Screen Shots" rel="ugc">Screen Shots</a>.
<h3>Thanks</h3>
This plugin couldn’t have been created without Patrick Fitzgerald’s awesome JavaScript tabifier: http://www.barelyfitz.com/projects/tabber/

Tabber Tabs Widget

Tried on the latest wordpress and still working just fine.  Styles could do with a little tweak but otherwise is very neat and simple.  Cheers



Still works

The easiest way to add a tabbed content area in your sidebar.

Tabbed Sidebar Widgets vs Tabber Tabs Widget