Tap Card (L.A) / Clipper Card (Bay Area) / Ventra Card (Chicago) / MetroCard (NYC)
Orca Card (Seattle / Puget Sound region)
CharlieCard (Boston), SmarTrip Card (DC), Compass Card (Vancouver), Presto Card (Toronto)
Suica and Pasmo cards (greater Tokyo area, almost nationwide usability?)
Rio de Janeiro, originals above and the new "Riocard Mais" which covers a bunch of different systems (metro, bus, BRT, etc) below
SEPTA key card ( South Eastern Pennsylvania Transit Authority, Greater Philadelphia area)
Nimoca (Fukuoka prefecture, but works nationally like suica and passmo)
Anonymous OV-chipcard / Personal OV-chipcard (The Netherlands)
The Rapid’s Wave card (Grand Rapids, Michigan metro area)
t-kort (Trondheim Area, Norway)
SUBE (some provinces in Argentina)
The design of Metro Cards is so fun and exciting, I need to start collecting them