Mac apps that work in unison with ipod touch apps?

Just about covers it. I want to get an itouch but want to know if their are apps that work together with both. Like with my last itouch I could use it as a remote camera when my isight was on on my mac(webcam), are there others similiar to this idea? if you can please give me a list of apps, or at least a description of ones you know work this way, thanks to all