Gpart is short for "guess partitions," and it can do just that with a variety of filesystems, including FAT 16/32, NTFS, EXT2/3, Linux Swap, ReiserFS, *BSD Disklabels, and several others. To install it, download the source code and compile it with make and make install (as root). Gpart is also included in live distributions such as Knoppix, which makes it more accessible.
