Omnibus flight controllers are all in one boards, that include a betaflight flight controller, Sd card reader, coupled with a built in OSD.  The pro versions also include a current sensor and BEC.  The ultimate version called the Omnibus Asgard also adds a built in 4x25A Dshot ESC built into the same flight controller for ultimate in integration.

CleanFlight / BetaFlight

Omnibus F4 V6 Flight Controller

£22.78 (£18.98 excl. VAT)