In many shotokan karate associations, the brown belt kata are Bassai dai, kanku dai, jion, empi and hangetsu.
Now this does vary between shotokan dojo and some do completely different brown belt kata, but these karate kata are practiced in most dojo at some point.
The kata video below, shows clips of all the above karate kata and they are taken from the KarateClassesOnline.com kata tutorial series.