Explore2fs is a program which can read ext2 and ext3 partitions perfectly from Windows. You can copy your data to a Windows drive without damaging either drive this way.
Ext2IFS is a program which actually mounts Linux ext2 and ext3 drives as logical dos drive ( E.G. E:, F:, G: ), but it doesn't read ext3 very well sometimes and it doesn't like WinXP for some reason.
Both programs are free and opensource.
If you want to copy the data using Linux, you can easily copy ext2/3 data to FAT32 drives if its enabled in your kernel. As for NTFS, you can enable NTFS write support in your kernel, but it's dangerous. You risk messing up your NTFS drives trying. If you want to write ext2/3 data to NTFS drives, do it from Windows using one of those two proggies I linked you to.
Hey I feel special, I actually know something about Linux