vCardExplorer is a program for displaying VCF files in OS X without opening Address Book. It also supports hCards.

What’s new:

Version 1.5:

    * added: transparent window on focus loss
    * added: shortcut cmd-return for always on top command
    * added: show/hide toolbar via shortcut cmd-shift-t
    * added: export as csv for gmail contacts
    * changed: window size to be more useable for hCards

Website
Download vCardExplorer