I never was good at documentation

Z:\zefie\Documents\Visual Studio 2013\Projects\ZefieCmd\ZefieCmd\bin\Release>zefie.exe --help
Zefie.dll Command Interface
Usage: zefie.exe [options] command value
Available Commands:

Hashing:
        md5 sha1 sha256 sha384 sha512

Options:
        -q, --quiet     Do not print filename with result

Acceptable Values:
        [filename, blank for stdin]

Encryption:
        encrypt decrypt

Options:
        -r, --raw       Raw binary data, instead of Base64

Acceptable Values:
        password [filename or text, blank for stdin]

File Browsing:
        openfile openfiles savefile

Acceptable Values:
        [title] [starting folder] [filter]

Folder Browsing:
        folder

Acceptable Values:
        [title] [show new folder button (yes/y/true/1 or no/n/false/0)]

Windows Form Dialogs:
        msgbox errordialog confirmdialog promptdialog

Acceptable Values:
        message text [title]

Random Hex String:
        genhex

Acceptable Values:
        length

Random String:
        genstr

Acceptable Values:
        length [characters]

Random Number:
        gennum

Acceptable Values:
        [max] or [min] [max]

Math:
        percent eval

Acceptable Values:
        percent: value max
        eval takes an expression, for example: 9*9/2

Other stuff:
substring (string) (start) (length)
contains (haystack) (needle)

Z:\zefie\Documents\Visual Studio 2013\Projects\ZefieCmd\ZefieCmd\bin\Release>zefie.exe scaleimage
Usage: zefie.exe scaleimage infile (WxH OR Width OR #%) outfile