DuPont 7723 low-temperature firing silver conductive ink is suitable for printing on glass. Adheres to ITO coated glass, and is Pb-free and solderable.
DuPont 9169 is a low-temperature curing Ag ink designed for flexible substrates. Has extremely high conductivity, strong adhesion to ITO coated flexible substrates, low contact resistance to ITO, and fine line capability. Are for touch screens and OLEDs.

DuPont Microcircuit Materials, http://www2.dupont.com/MCM/en_US/