The team at Type Together, creators of the extremely popular Bree font, is offering Rue Display, designed by Winnie Tan, as a free download.
Rue Display has a nice intro on its page:
Rue is an organic, casually ornamental, narrow-faced sans serif. It is a display type structured with random traces of calligraphic tendencies. It does not begin with any noble ideals, other than to mediate between the muse of imagination and the act of realization.