[bitwize]

NetBSD can read ext3/4 with a puffs filesystem driver... these days it can support ext4 extents natively as well, just not journalling.

Puffs is the NetBSD version of FUSE, and there is even a FUSE-to-puffs adapter so you can mount FUSE filesystems under NetBSD.

[anthk]

SO does OpenBSD with FUSE, and with NTFS you have ntfs-3g in ports.