Here's something neat from 68kmla:
"I started this quite some time ago, then ran into problems and let it rot for some months, but I now have a usable version.
FuseHFS is a MacFUSE filesystem that provides write support for HFS disks.
I haven't tried it with real media, but you can create HFS disk images, mount them, and copy things to/from them.
For Mini vMac/Basilisk/SheepShaver, you should make sure the disk image has no partition map, or else it won't be recognised."
It is based on hfsutils, which is what Lauri based his HFVExplorer on, back in the day.