Wide range, low power temperature sensor
This pressure sensor from Freescale is a great low-cost sensing solution for measuring barometric pressure.
Measuring stretch forces isn't easy - unless you have some conductive rubber cord! This cord is 2mm diameter, and 1 meter long, made of carbon-black impregnated rubber. Usually this material is used for EMF gasketing, but its also very fun to play with.
This sensor can detect flexing or bending in one direction.
FSRs are sensors that allow you to detect physical pressure, squeezing and weight.
Hall effect sensors detect whether a magnet is near.
IR sensor tuned to 38KHz, perfect for receiving commands from a TV remote control.
The TSL2561 luminosity sensor is an advanced digital light sensor, ideal for use in a wide range of light situations. The best part of this sensor is that it contains both infrared and full spectrum diodes! That means you can separately measure infrared, full-spectrum or human-visible light.
This is an "omnidirectional" microphone, with -44dB sensitivity, and has 20-20KHz frequency response.
The BPW34 is a tiny, general purpose PiN photodiode.
This is a very small light sensor.
Piezo buzzers are used for making beeps, tones and alerts.
The VCNL4010 sensor is a nice way to add a small-distance proximity sensor to your microcontroller project.
An assortment of the most common sensors used in electronics. 9 sensors and 3 additional components to interface with the 'analog world'.
This 1.5" diameter speaker cone is the perfect addition to any audio project where you need an 8Ω impedance and are using 0.25W of power.
Unlike most distance sensors that rely reflected light intensity or reflected angles to determine range, the VL6180 uses a precise clock to measure the time it takes light to bounce back from a surface.
This is the fantastically easy to use sensor from Maxbotix.