more to come...

Actuators
Light-Emitting diode (LED)
Lamp
Coil
Servo motor
Motor
Motor using motor driver L293D
Generic Liquid Crystal Display (LCD)
Generic Binary device

Analog sensors
Light sensor (Photoresistor)
Potentiometer
Sound sensor (Microphone)
SHARP Range sensor (Infrared)
Pyroelectric sensor
Bend sensor
Stretch sensor (Rubbery ruler)
Piezoelectric film sensor
Accelerometer (Analog mode)
Generic analog sensor

Binary sensors
Switch / Button
Tilt sensor
Hall (magnetic field) sensor
Touch sensor
Rotary encoder
Accelerometer (Binary mode)
Generic binary sensor

Communication devices
Parallax RFID reader

i2c (Two Wire Interface sensors)
SFR08/10 Devantech Ultrasonic Ranger

more to come...