Wellbutrin is a great one, probably the most commonly used outside of stimulants, especially before Strattera. Also, several of the old TCAs, imipramine in particular, but also desipramine and nortrypline can be helpful for some people with ADHD or ADD. Fetzima and Effexor have also been used, but with mixed results, much less effective. Along the same thread MAOIs are also effective, albeit less so, and difficult to handle all the dietary restrictions.
Clonidine and Intuniv can also be used. They're especially helpful with helping with mental functioning.

If your doctor is comfortable with any stimulant, try asking about Vyvanse. It's metabolized by your digestive system to the active med and it's not activated if broken/crushed etc, so theoretically the abuse potential is lower. Obviously, you can still abuse it orally, but some prescribers seem to be more comfortable with it.
Good luck. I hope you find something that works. Let me know if you have any more questions.