Julian T et al. (2013). iPhone® applications as versatile video tracking tools to analyze behavior in zebrafish (Danio rerio). Pharmacol Biochem Behav 106:137-142.
Gerlai R et al. (2006). Effects of acute and chronic ethanol exposure on the behavior of adult zebrafish (Danio rerio). Pharmacol Biochem Behav 85(4):752-761.
You might also look at the various studies that are promoted on the Noldus for Zebra fish. http://www.noldus.com/animal-behavior-research/products/daniovision
We use particle tracking software developed by the Ekker lab (Mayo Clinic) to quantify spontaneous swimming activity. This is straightforward and requires only an enclosed cabinet containing a light box and mounted DVD camera. Heiko Schoenfuss (St. Cloud State) helped us to set up a quantitative predator avoidance assay using a vibration stimulus (cell phone vibrator motor) and high-speed (1000 frames/sec) video camera. Florian Engert (Harvard) has developed many behavioral assays pertaining to prey capture. The Masino lab (University MN) also uses these.
I saw a fairly complex apparatus for assessing zebrafish behavior as part of a conference presentation last week. The apparatus was basically a huge camera pointed at plates with wells of zebrafish that could be subjected to auditory, visual, vibrational, or electric stimuli and subsequently measured for various reactions. The researcher was Randall T. Peterson of Harvard/Mass General.