The Foxeer F722 V2 Flight Controller features has many cool features like the PASS function, which allows you to wire up your quad when using Crossfire and you can also connect this FC to your DJI FPV Digital HD System.
The HGLRC Zeus F722 Mini 2-6S 20x20 Flight Controller comes with an integrated barometer and 16M black box. Features MPU6000, includes 5 UARTS, STM32F722 RET6 CPU, and can easily be connected to your DJI Digital HD FPV System.
The Zeus5 AIO flight controller is designed for ultra light quadcopter builds. It features an F411 FC, along with OSD and 4x 5A BLheli_S ESC, and WiFi functionality. All into a tiny package that weighs just 4.2g.
The T-Motor F4 Flight Controller comes with an LC filter, which is great for eliminating interference to your VTX or other equipment. Loaded with 6 UARTs and is specially optimized to fit the F55A PRO II.