Free Network Scanning Tool

Advanced IP Scanner tool enables one to scan an IP address range for "alive" and/or "dead" addresses, manufacturer's name, MAC address, etc.

Find it @ http://www.radmin.com/products/ipscanner/

Scaling the Universe

amazing.. . .

http://htwins.net/scale2/scale2.swf?bordercolor=white

Microsoft Private Cloud

A good book on the subject

http://www.amazon.co.uk/Microsoft-Private-Cloud-Computing-Aidan/dp/1118251474/ref=sr_1_1?ie=UTF8&qid=1334957282&sr=8-1

TinkerCAD 3D Printing

With Tinkercad you can design real things that come out of the 3D printer; see https://tinkercad.com/about/

Shapeoko

Desktop Computer Numerical Control (CNC) machine:

http://www.shapeoko.com/