a person or thing that develops.

Photography . a reducing agent or solution for developing a film or the like.

a person who invests in and develops the urban or suburban potentialities of real estate, esp. by subdividing the land into home sites and then building houses and selling them.

Shipbuilding . a person who lays out at full size the lines of a vessel and prepares templates from them.

noun

builder , planner , real estate investor , contributor , creator , pioneer