Turbo C++/Borland C++ (with Object Windows library) was the best C++ IDE on MS-DOS in the early/mid 90's. All their tools were excellent. They were leading the industry in the usage of C++ on PCs and should have built upon that advantage; but then they lost it all to MS Visual C++ (with MFC library) when Windows came along.
It was one of the earliest and best textbook case of management screwing up a technical company.