- Supports more formats than I can remember. Zip, Tar, Gzip, Bzip2, 7-Zip, Rar, LhA, StuffIt, several old Amiga file and disk archives, CAB, LZX, stuff I don't even know what it is.
- Copies the Finder file-copying/moving/deleting interface for its interface.
- Uses the character set autodetection code from Mozilla to auto-detect the encoding of the filenames in the archives.
- Supports split archives for certain formats, like RAR.
- Built around libxad (http://sourceforge.net/projects/libxad/). This is an old Amiga library for handling unpacking of archives. It supports a whole lot of formats, and I added a couple more, and bugfixed old code. I also wrote a higher-level Objective-C wrapper around it, which might be useful for other projects too (including Xee).
