FileAct provides easy multi-file operations.

Features :

    Remembers 7 different (OSCLI) command lines that can be invoked on files or directories in three different ways (double clicking while pressing ALT or CTRL, dragging to an appropriate command line icon, or dragging to FileAct's iconbar icon).
    Allows C-like '%' type arguments in those command lines, to be substituted with (parts of) a target object's path prior to execution of the command line.
    Can optionally recurse into directories (i.e. also invoke the command line on all objects found within the directory).
    As an extra, can execute a command line on detecting specific keypresses.