Ingen is built around LV2 technology and a strict separation of engine from user interface. The engine is controlled exclusively through a protocol, and can execute as a headless process, with an in-process GUI, or as an LV2 plugin. The GUI can run as a program which communicates over a Unix or TCP/IP socket, or as an embeddable LV2 GUI which communicates via LV2 ports.
Any saved Ingen graph can be loaded as an LV2 plugin on any system where Ingen is installed. This allows users to visually develop custom plugins for use in other applications without programming.