MicroStation PowerDraft is a professional-level application used for
production 2D/3D drafting and detailing. PowerDraft provides an
intuitive interface for creating, editing, and manipulating drawings
and models in DGN or DWG format and is completely integrated with all
Bentley solutions.
Because PowerDraft and MicroStation are based on the same code base,
they share many of the same features and functions, including
MicroStation's full suite of referencing, dimensioning, text, and
drawing tools.

http://www.bentley.com/en-US/Products/Bentley+PowerDraft