Meazure - What are the dimensions of that image? How big is this window?
Tinitell - Wearable mobile phone for kids. GPS enabled.
Bluegrams Screen Ruler - A lightweight and configurable ruler tool for Windows Desktop.
Toymail Talkies - Toys that connect people
On-Screen Ruler - lightweight, free, semi-transparent ruler
Kids in Touch - A safe, fun, messaging app for kids monitored by parents