Prime number generator, a producer of the ordered sequence of prime numbers

Electrical generator

Pseudorandom number generator, producer of a sequence of random or nearly-random numbers

anything that creates source code automatically in generative programming

Generator (computer science), a specialized routine that acts like an iterator

A Generator in the anime Generator Gawl is a metal-organic hybrid organism with far greater powers than that of a human.

Generator (album), an album by punk band Bad Religion, and its opening track

A program which produces a stream of data

"Generator" (song), a song by The Foo Fighters

Natural language generator, a program that produces human language from a machine representation

Generator (mathematics), any of several closely related usages in mathematics.

A zero-generator, the pseudo-device /dev/zero outputs a never ending stream of zero-valued bytes

"Generator" (The Holloways song), a song by The Holloways

Code generator, a program which creates source code as its output

Generator matrix, a matrix whose rows can generate all the elements of a linear code