WinFsp: helper to develop user mode file system in Windows

This project provides an infrastructure to build user mode file system:

  • A kernel mode file system driver is responsible of re-routing IRP to user mode code,
  • A library provide a low level abstraction to build user mode file system. This part make the glu with previous kernel driver. A FUSE compatible layer is also provided,
  • a sample fs, memfs: an in memory file system,
  • A Windows Service called WinFsp Launcher to launch multiple user mode file system.

Source: Main | WinFsp

EDIT: Yet another solution for developping user mode filesystem with FUSE support: https://github.com/dokan-dev/dokany.