Arduino Tiny RTC I2C DS1307 AT24C32 24C32 memory Real Time Clock Module
While this chip does function correctly, it drifts about 20 minutes per month.  I swapped it out for a Chronodot.  Since this RTC and the Chronodot are code compatible, I'll keep using this for prototyping purposes, with the knowledge that it won't be in any finished device, due to the drift.