LibELM is a FAT driver, like libfat. However, LibELM is based on the amazing ELM FatFs driver by ChaN. LibELM has a devoptab so you can use stdio functions (fopen, fread, etc.)! Directories and LFN filenames are supported! Completely usable for everything! 1.3 is the True Final release, if there are any bugs, please report them on the talk page, and I will fix them A.S.A.P.
Read more about LibELM v1.4 (Wii misc)