Texas Instruments CD74HC4067 16-Channel multiplexer.
What can you do with it? How about taking an analog to digital reading from 16 devices with only 1 ADC channel and 4 control pins.
That's right, 16 for the price of 5! 24-Pin SSOP package.
Works great with our 28-Pin SSOP to DIP adapters.

Documents:

• Datasheet
• bildr blog - CD74HC4067