That would be Project Builder and Interface Builder. Project Builder was kind of a graphical make tool and Interface Builder was the real star of the show, it was the graphical user interface builder. And there was Edit for source code editing.
There were sold as separate product, NeXTStep Developer that had all the development tools, but if you bought the education version of NeXTstep the developer tools came bundled.
There were sold as separate product, NeXTStep Developer that had all the development tools, but if you bought the education version of NeXTstep the developer tools came bundled.