Some of the best are the laser (monochromatic light or Light Amplification by Stimulated Emissions Of Radiation), the ATM (automated teller machines) and the first non-commercial computer mouse. Light emitting diodes (LEDs) were also a big invention that nearly every electronic device today uses.
Color TV
Integrated Circuit Video Computer Game "SpaceWar" Cassette Computer Language "BASIC"
The cassette, the first computer game and the video tape recorder
inventions
What are some Mohawk inventions
What are some of the inventions of the akkadians?
What are some small and unknown inventions?
Some useful inventions are the light bulb, wheel, and the telephone.
You can find some inventions in the Wikipedia article "List of inventions".
Some inventions from 2000-2011 are the iPhone and the iPad.
Benjamin Franklin's inventions were numerous. Some of those inventions were bifocals, swim fins, the lightening rod, the Franklin stove, and the odometer.
See: http://www.whitehat.com.au/Australia/Inventions/InventionsA.html