Adding Ext2 support to Windows

• http://www.fs-driver.org/ - Looks promising
• EXT2FSD - Matt Wu's driver. Write support, last update: 9/2005
• Download
• EXT2IFS - John Newbigin's driver. Write support, Last update: 1/2004
• WinExt2FSD- Manoj Joseph's driver. Write support, last update: 11/2002
• Download
• Paragon Ext2FS Anywhere - Commercial product. $30 USD, Last update: 12/2002

Adding ReiserFS support to Windows

• rfsd-ReiserDriver
• ReiserDriver is an Installable File System Driver (IFSD) that allows ReiserFS partitions to be accessed under Windows. The project is currently in development, with a final release scheduled for August 9th, 2005.
• RFSTool

Adding Ext2 support to MacOS

• MountX - Benjamin Herrenschmidt's MacOS (pre-9) driver which allows you to mount ext2 filesystems (Linux and MkLinux) (benh@kernel.crashing.org)
• This link is no longer active and I am unable to locate this package.
• OS/X should have native support via e2fsprogs.

Adding NTFS support to Linux

• Captive - Jan Kratochvil's wrapper. Write support, Last update: 12/2005
• Paragon NTFS for Linux - Commercial product. $70 USD, Last update: 06/23/2005