The 1.0 version of NTK is here! Read the announcement.
NTK (the NETLab Toolkit) is a visual authoring system for designers, developers, makers, researchers and students who want to design and build tangible Internet of Things projects. Connect sensors, actuators, media and networks with the drag and drop smart widgets. Concepts can be prototyped quickly, encouraging iteration, experimentation and testing by sketching in hardware and building connected systems.
NTK works with the original Arduino and newer Linux embedded systems like the Intel Edison and Raspberry Pi. And NTK can be easily adapted to do new things. The Code widget allows users to easily add custom Javascript snippets. And with a bit more expertise, users can create their own, reusable widgets.
Go ahead, Drag and Drop the Internet of Things.
Each Widget has a different function. Connect them together to send data from one to the next.
In the Arduino IDE, put the EXAMPLES>FIRMATA>STANDARFIRMATA sketch on your Arduino. Attach sensors and actuators, and plug the Arduino into your computer.
Install and run NTK on your Intel Edison, Raspberry PI, or other Linux embedded processor. Then point your mobile or desktop web browser to the IP address of your system.
NETLabTK - Tangible IoT
We’re making great progress towards our Beta release which is coming in September or early October  UPDATE Oct 26: we’re... 
Status Update – June 2015 Scott Cazan and I have been hard at work on getting NTK to the... 
We’ve added a new IfThen widget, which makes is easy to make decisions about the project behavior. Overview IfThen compares input values to...