Links to access phone features from browser

I know that I have seen something like this in somewhere...But no remember where. Does somebody know what are the features of a smartphone(iphone, android, blackberry) that I can access from a Web Browser? In some place I had see a list of links that can access different features of the phones(too many). I mean, I know some things like:

<a href="tel:PhoneNumber">Link Text</a>
<a href="sms:Number?body=Message">Link Text</a>
<a href="smst开发者_如何学Co:Number">Link Text</a>

but, is it there something like:

<a href="Camera:access">Link Text</a> ???? OR
<a href="Accelorometer:access">Link Text</a> ????

Thank for your answers!!

For iOS, it all works via a system called URL Schemes. Checkout this website which even builds the right link for you in HTML.