Colonial anthem
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The Colonial anthem plays briefly during a fly-by of the last Viper Mark VII squadron of Galactica during its decommissioning ceremonies held in its new museum, shortly before a speech given by Commander William Adama (Miniseries, Night 1).
The anthem also plays in a documentary on the crew of Galactica created by D'Anna Biers. A crewman, Stan Gibson, whistles while he mops a deck on the ship, then an orchestral version of the anthem is heard as several pilots enter the hallway (Final Cut).
Notes
The Colonial anthem is, of course, an homage to the Original Series's main theme.