I'll give you ext3, certainly as ext2 and ext3 share a codebase. They are wholly unrelated to FAT though, ext and minix both derive from the UFS/FFS branch of file system development which has little, if nothing in common with FAT filesystems.
[edit] The original 8-bit FAT and FFS were both implemented at about the same time, if you consider FFS's beginning to be when I-nodes were moved into cylinder groups. If you consider the Unix "FS" to be the beginning, then it predates FAT by a lot. In any event inode and cluster-chain systems have fairly significant differences.
Also, long-structured/CoW systems have been used as backends for databases for about 40 years now.
[edit] The original 8-bit FAT and FFS were both implemented at about the same time, if you consider FFS's beginning to be when I-nodes were moved into cylinder groups. If you consider the Unix "FS" to be the beginning, then it predates FAT by a lot. In any event inode and cluster-chain systems have fairly significant differences.
Also, long-structured/CoW systems have been used as backends for databases for about 40 years now.