This small and tidy 3-channel data logger is designed for brute-force, quick (50Hz) data collection.
Once there was a man with a model rocket who wanted to record stuff as it shot through the sky. He needed a small, lightweight, simple-to-use data logger to plug his accelerometer, temperature, and altitude sensor into. He wished so hard that he awoke the next morning with the Sparkfun uLog module nestled into his fist. (Kids, electronic design really doesn't happen this way).
The uLog is a small analog data logger based around an AVR ATtiny24 microcontroller that blarfs what it measures into a 16Mbit memory, which fills up in about 2 hours. Running from a 3.7V lipoly cell, it draws only 4mA, even when linked to a ADXL321 accelerometer.
A small microcontroller can only support so much code, so its interface is tidy, but functional: