SKKV UnPacker is a freeware unpacker/decoder for Windows Mobile 2003, 5.0 and 6.0 based Pocket PCs and Smartphones that allows you to extract files from the following types of compressed archives on your mobile device:

LZH
ZIP
GZIP
TAR
BZIP2
Compress
MS CAB
Ync
ARJ
IMP
BASE64
UUencode
XXencode

Download SSKV Unpacker here