Dataloggers and data recorders
Sparkfun GPS logger shield converts your Arduino board into a wonderful logger board.
Sparkfun OpenScale measures both temperature and weight with operating voltage of 5V.
Adafruit Assembled Data Logging shield for Arduino a data logger that is essential to store data of your projects
Logomatic v2 Serial SD Datalogger is used for data logging for your projects
This GPS shield works great with either UNO or Leonardo Arduinos and is designed to log data to an SD card.
SparkFun OpenLog is an open source datalogger for logging your serial data.