These are unofficial targets for INAV. Some of the targets provide support for flight controller boards that do not have official INAV support. Others add features to boards that are supported, such ...
INAV no longer accepts targets based on STM32 F411 MCU. INAV 7 is the last INAV official release available for F411 based flight controllers. The next milestone, INAV 8 will not be available for F411 ...