PeaZip is a free archiver, available as portable and installable software for Windows and Linux.
Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, ZIP
Extract ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF and many more file formats
PeaZip allows to create, convert and extract multiple archives at once, create self-extracting archives, bookmark archives and folders, apply powerful search filters, scan and open files with custom applications, apply strong encryption, split/join files, secure data deletion, calculate checksum and hash...

On networks, the application can be made available to multiple users, either whith a shared configuration or with separate configuration for each user, see "Settings" and "Customization and scripting" in the help file, that also contain useful hints for enhancing PeaZip's system integration.
You can freely replace backend executables in PeaZip/res directory (any PeaZip release/package) with updated ones (as long as they support the same syntax) or with 64 bit counterpart, if available.
PeaZip portable does not modify the host system: it can be simply extracted in the path you prefer (a writeable path is recommended), even on the network or on removable devices as USB sticks.
To extract ACE files it is needed a separate plugin (due to UNACE freeware but closed source nature) available in Add-ons page.

* PeaZip is available in many different languageszip, click Options > Localization to modify language of the GUI. If you are willing to contribute a translation check information in peazip-x.y.about_translations.zip file.
* PeaZip's sources (LGPL v3) are written in FreePascal and requires Lazarus IDE, see notes for developers
* PeaZip's PAD file