Explore2fs is a GUI explorer tool for accessing ext2 and ext3 filesystems. It runs under all versions of Windows and can read almost any ext2 and ext3 filesystem.

FFS File System Driver for Windows enables you to read BSD(FreeBSD, NetBSD, OpenBSD) FFS(UFS) partitions from Windows 2000/XP/2003.

rfstool - ReiserFS for Windows - allows you to access ReiserFS partitions from a Windows 95/98/ME/NT/2000/XP system. Starting with version 0.6, it even allows you to access ReiserFS partitions from Linux ;). It is a complete rewrite of the ReiserFS functions needed to list directories or access files.

YAReG is a free graphical frontend for rfstool.
It provides easy and comfortable read access to your ReiserFS formatted Linux partitions through an user interface familiar from Windows Explorer.

ADFlib :: a free, portable and open implementation of the Amiga filesystem.

FFS File System Driver for Windows enables you to read BSD(FreeBSD, NetBSD, OpenBSD) FFS(UFS) partitions from Windows 2000/XP/2003.

The goals of the Linux-NTFS project are to develop reliable and full feature access to NTFS by the Linux kernel driver, and by a user space filesystem (ntfsmount), and to provide a wide collection of NTFS utilities (ntfsprogs) and a developer's library (libntfs) for other GPLed programs. We have achieved already a lot, with high quality results.

The StreamSuite is a suite of commandline utilities written in c# that manage NTFS alternate file streams (currently only available in Win2k and WinXP). I hope to eventually be able to make it as easy to work with file streams as with regular files.

ufs2tools contains tools for reading ufs (ffs) filesystems and bsd labels from windows 2000/XP. Both ufs1 and ufs2 are supported.

ufs2tool is a program for reading ufs filesystems from windows. You can retrieve files and directories recursively. You can also list directories. bsdlabel is a program to read bsd labels. Only BSD UFS is supported (other implementations such as Solaris UFS will not work).

ReiserDriver is an Installable File System Driver (IFSD) that allows ReiserFS partitions to be accessed under Windows.