The nt2linux kit provides tools to extract configurations from an NT server and migrate them to a Linux server. You can migrate user accounts and passwords, share definitions, access control lists, printer definitions, and network settings. You run one utility on the NT server (you must be administrator) and it produces a file which the Linuxconf nt2linux module imports into various Linux files.
Virtualfs provides a set of plugins and let you define new ones. Each plugin may intercept and enhance file system operation. Various plugins are already done, including remote device access for Xterminals (to access the floppy, CD, and sound cards with standard applications), auto-mounter (browse and automount your SMB shares), access control lists, etc.