NDK++provides a set of widgets for text user interface like menubars, popup menus, various dialog boxes, and controls (push buttons, check buttons etc.). Using this library you can easy create a powefull console program with compicated interface. А powerfull event engine allows you to create a various dynamic widgets.
There are two big branches of this library avaliable - main (head) and the ALT:

• Main - original NDK++ library. This library is an extention of libncurses++ library. Event system is working like MFC. 
• ALT - full rewrite and redesign of the previous code. It not a superset of libncurses++ library, it uses only ncurses and panel libraries. It also uses a new event engine.

You can download all releases here

Main branch

Read API Documentation here.
Latest version in main branch is 20030303

ALT branch

ALT Brabch is divided into two parts:

• Low level ncursesxx library. This is a modern replacement of libncurses++ library. Provides generic interface to basic ncurses objects like terminals, windows, panels, pads, color pairs etc. Latest version of ncursesxx is 0.0.1beta3.
• High level ndk++ library. Contains event engine and complicated dynamic widgets. Latest version of ndk++ is 0.0.1alpha3
  

Read API Documentation here.

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The original author of the NDK++ library is Miguel Pinkas. ALT branch is written by Stanislav Ievlev with big help from Alexey Voinov.