Software developer, one who programs computers or designs the system to match the requirements of a systems analyst
"Developers, Developers, Developers", a viral video of Steve Ballmer praising software developers
game developer, a person or business involved in game development, the process of designing and creating games.
Real estate developer, one who builds on land or changes and enhances the use of an existing building for some new purpose or to better effect
Photographic developer, a chemical, often a mixture of metol and hydroquinone, which converts the latent silver halide image in the exposed photograph material into reduced, opaque, black silver metal