is there another non-stimulant med other than Strattera for ADD

No, I am pretty sure Strattera is the only one of it is kind, although I am sure eventually there will be others.

There r many factors that can cause ADD. One well known factor is too much sugar & food additives in the food we eat. Cutting these down can go some way to improving health.
Fish oils r also known to help with ADD. Make sure u r eating plenty of food rich in Omega 3 & 6 such as mackeral, tuna, sardines & salmon. It may be worth buying the fish oil supplements if u dont like eating much fish!
Also, try to drink at least 1.5ltrs of water every day as this helps improve concentration & many other ailments such as depression & digestive disorders.