Fubarino SD board with PIC32MX795F512H microcontroller.
Olimex PIC32-RetroBSD board. Essentially, it's a variant of Pinguino-Micro board with MX795 microcontroller.
Maximite computer, both original and color models.
chipKIT WF32 board, with microSD card on 2.4" LCD TFT display shield. WF32 board by itself already has a microSD socket, but it's useless for RetroBSD, as it is connected to GPIO pins, not to SPI port. Fortunately, a cheap shield is widely available ( Ebay, Amazon, AliExpress), which adds a microSD slot connected to SPI2 pins.
MikroElektronika multimedia board for PIC32MX7 microcontroller.