There’s now a new STM32 version of uLisp that supports the Maple Mini and Blue Pill STM32 ARM Cortex-M3 boards, widely available at low cost on sites such as eBay, AliExpress, and Banggood.
The STM32 version supports 32-bit floating-point and integer arithmetic, and it allows the Lisp workspace to be saved to the STM32’s non-volatile flash memory. For more information see STM32 boards.