Glancing at a selection of these ideas, many have already been done.

A big part of starting a business is ensuring that you do your market research right, know your competitors and identify what need you are fulfilling.

Some examples:

* "Share your wifi" - see http://www.btfon.com - this started years ago and is back by a huge telecommunications company.

* Checking browser and O/S versions - https://browserlab.adobe.com/en-us/index.html

* Anonymous email - http://www.sendanonymousemail.net etc.

* Online image editing... http://www.photoshop.com etc.

RS