SoftBench was released in 1989 and presented in the June 1990 HP Journal.1 It was an early adoption of some of the IDE ideas that are common today in well known IDEs like Eclipse.
Cagan, Martin R. (June 1990). "The HP SoftBench Environment: An Architecture for a New Generation of Software Tools". Hewlett-Packard Journal. 41 (3): 36–47. /wiki/Hewlett-Packard_Journal ↩