7-Zip Software announced 7-Zip 3.11, a free software distributed under the GNU LGPL license that supports a multitude of other formats – 7z, ZIP, CAB, RAR, ARJ, GZIP, BZIP2, TAR, CPIO, RPM and DEB. 7-Zip says that the new 7z format offers 30-70 percent improvement over the compression ratio in ZIP format based solutions.