UltimateZip supports 16 Archive types, e.g. Ace, Arj, Cab, Lha,Rar, Tar, GZip, Zip and so on. It has many features like Zip and Mail,shell integration, full drag and drop support, selfextracting Zip archives,multi-disk spanning, CheckOut, Install, Ziprepair and Favorites. Also allows youto encrypt archives and files, using the AES standard (Rijndael). UltimateZip includes a Wizard interface for easy compressing, updating, extracting, and decoding, Favorite Archive Folders, Build-in text viewer, Virusscanner integration (external program needed), Archive converter.
UltimateZip 4.0 is an easy to use archive utilty. With its flexible user interface, UltimateZip is easy to use for first-time users and offers many features for power users.

Superior ZIP Support
UltimateZip offers supperior ZIP format support. Here are the most important features:
Support for unlimited file size and unlimited number of files in ZIP archives
ZIP AES support (WinZip 9.0 standards supported)
Fast and strong compression and decompression
Multiple disk spanning

7-ZIP Support
7-ZIP is an advanced compression format featured in UltimateZip. It is an open source format, providing an open architecture and high compression ratio. 7-ZIP outperforms most other archive formates. The 7-ZIP format is not controlled by any organization or individual, but by an open source LGPL project to which anyone can contribute. More information about 7-ZIP can be found at 7-Zip.org.

Multiple Formats Support
UltimateZip supports most popular compressed and encoded formats currently in use.
Read and write support for ZIP, 7-ZIP, CAB, LHA (LZH), TAR, GZIP, BZIP2, BH,
XXE, UUE, and MIME (Base 64)
Read and extract support for: RAR, ARJ, ARC, ACE, ZOO

Security
UltimateZip comes with full support for WinZip® AES standard(128-bit/192-bit/256-bit AE-1 & AE-2), and offers strong file encryption with the UZE encryption format.