In recent years, there are more and more bio-sensor products on the market for consumers utilizing various sensor technologies, some more affordable than others, and few allow access to actual sensor data streams.
Links for many of these products are listed below. You can help us make this list more complete.
Motion sensor pedometer: http://store.nike.com/us/en_us/?l=shop,pdp,ctr-inline/cid-1/pid-579306/p...
Motion sensor pedometer: http://www.fitbit.com/one/specs
Motion sensor pedometer: https://jawbone.com/up
Motion sensor sleep monitor: http://lark.com/products/lark-pro/design-technology
Motion sensor smart watch + smartphone: http://getpebble.com/
Bundled application on smartphone with GPS: http://www.engadget.com/2012/11/01/google-now-slips-in-a-pedometer-card/
Heart Rate pulse sensor watch: http://www.mybasis.com/basis-healthy-habits-technology/
Heart Rate pulse sensor watch: http://www.alphaheartrate.com/#product
Heart Rate pulse sensor band: http://www.digifit.com/scosche/rhythm/
Heart Rate pulse sensor monitor: http://www.heartmathstore.com/category/emWave2/
Heart Rate ECG sensor: http://www.ezsleep.com.tw/Frame/products_2_1.html
Medical Heart Rate portable monitor: http://www.alivecor.com/
Portable ECG/HR monitor: http://www.scanadu.com/news/
EEG headset: http://www.neurosky.com/Products/MindWave.aspx
EEG headband: http://www.plxdevices.com/product_info.php?id=XWAVESPORT
EEG headband: http://www.indiegogo.com/interaxonmuse
EEG/ECG wearable sensor: http://www.op-innovations.com
EEG multi-channel headset: http://www.emotiv.com/store/headset.php
EEG sleep monitor: http://www.myzeo.com/sleep/shop/
Remote motion detection sleep monitor: http://www.renewsleepclock.com/about/
Optical REM detector: http://remdreamer.com/shop_rem-dreamer.php
Optical REM detector: http://www.lucidity.com/novadreamer.html
Skin conductance emotion detection watch: http://www.affectiva.com/q-sensor/
Skin conductance detector: http://www.thoughttechnology.com/hardware.htm
Skin conductance detector: http://en.wikipedia.org/wiki/E-meter