Tools and utilities written by sceners in order to handle and program game consoles.

A packer or cruncher is a tool for compressing files so that they take up less diskspace. Such tools were extremely popular on the c64, Amiga and MS-DOS platforms, but exist on all popular demoscene platforms.

Source code (or a link to it) is included in the archive or on the production page. Note this doesn't necessarily mean the production is free software (FOSS).