A term was introduced in passing at Rootstech that I loved: stackware. It's the software one uses while researching. This could be either on a phone or a computer, although it's getting harder to tell these two items apart.
I recently transitioned from an iPhone to and Android based phone. Specifically I opted for the Dell Streak because of its long-ish battery life and large screen. In terms of disclosure, I do work for Dell but made my decision and purchase at a local big box store.
Moving from iOS on the iPhone to Android was relatively straight forward. Since a number of the Android applications are 'in the cloud', a google account is required. This enables the user to have access to their calendar, gmail, contacts, browser favorites and even map favorites. Virtually everything that I used on a day to day basis on my old phone was available on the new one.
In terms of genealogy, I find myself using the new device more than the old. While not a replacement for a netbook or laptop, a smart phone (iOS, Android or Windows) can serve as a compliment to your primary devices. Specifically I have found the camera, when used in conjunction with applications such as CamScanner or DropBox, to be a more than adequate replacement for copy machines.
Several other important items in my personal list of 'stackware' are:
Google Navigation, for finding that research facility or cemetery;
Find Grave, a dedicated interface to the findagrave.com site;
WorldCat, to locate that elusive resource that doesn't happen to be in -this- library ;
GeneDroid and GedStar Pro, to have my past research at my fingertips;
Twitter and Facebook, when I might need a bit of assistance from my peers or perhaps just to vent;
and of course, Pandora, for some background music, even if it insists on playing Journey once an hour.
What is in your stackware list? Anything that can only be found under one operating system that would keep you from switching? Or perhaps uncommon uses for non-genealogy applications?