Zipper is a great yahoo widget and it helps in zipping/unzipping the files immediately. All you need to do is just drag it onto the widget, no right clicks no nothing and it will do the job!
Zipper compresses these files into an intelligently named archive, or drop archive files and it will unzip them into folders.
Now supports the following file formats:
Compression: ZIP, 7ZIP, TAR/GZIP and TAR/BZIP2.
Decompression: ZIP, 7ZIP, TAR/GZIP, TAR/BZIP2, Z, RAR, CAB, ARJ, LZH, CHM, HXS, CPIO, RPM and DEB, plus zipped Widgets and self-extracting executables.
Download / More info (Follow Link)