Filesystem for NOR flash

Hi,

If anyone looks for an open-source filesystem for NOR flashes, please, 
consider my implementation:
https://github.com/ivanovp/pifs

There is an emulator for PC and few demos for STM32 MCUs: Nucleo-F413ZH, 
Maple Mini, STM32F4_VE (cheap Chinese dev.board). It supports 
directories, dynamic/static wear leveling.

Best regards,
Peter