XArchive is a generic front end for archives that uses external wrappers around the command line tools. XArchive checks it's wrapper directory when it starts, consulting each wrapper found to see what file types are supported. Thus, a new archive format can easily be supported by just writing a wrapper for it and dropping it in the wrappers directory.
Use K7Z if you want to:
* Backup a folder to a storage location
* Create or extract a password-protected archive
* Update an existing archive quickly
Ark (2.6.3) is handy but it doesn't seem to:
* Create archives with passwords
* Extract (some) archives with passwords
* Update existing archives by default
K7Z is a simple application that attempts to fill these voids. It probably won't become a total archiving solution.
For installation instructions, see INSTALL.txt. If you encounter any problems, see ISSUES.txt and send me an email if necessary.