Project Builder

Project Builder was an integrated development environment (IDE) originally developed by NeXT for version 3 of the NeXTSTEP operating system by separating out the code editing parts of Interface Builder into its own application.^[1]

Project Builder

Developer(s)	NeXT, Apple Inc.
Initial release	3.0 / September 8, 1992; 32 years ago (1992-09-08)[1]
Final release	2.1 / December 1, 2002; 22 years ago (2002-12-01)[2]
Operating system	NeXTSTEP, macOS
Type	Integrated development environment (IDE)
License	Freeware with open-source components

After Apple Computer purchased NeXT and turned NeXTSTEP into the Mac OS X operating system, the NeXTSTEP version of Project Builder became ProjectBuilderWO (maintained only for WebObjects development). Apple created a new Project Builder from scratch for software development with the first version being introduced with Developer Preview 4 of Mac OS X.^[3] This version of Project Builder, informally dubbed PBX.^[4] was distributed with the first few versions of Mac OS X but with the release of Mac OS X v10.3 it was redesigned, reintegrated with Interface Builder and rebranded as Xcode.^[5][6][7]

Before OS X, developers could use Macintosh Programmer's Workshop or CodeWarrior to develop Macintosh applications.

GNUstep's ProjectCenter IDE is a rough workalike of the original NextStep design; additional functionality is provided by ProjectManager, a 3rd-party GNUstep IDE meant for greater usability.