Structorizer is a little tool which you can use to create Nassi-Schneiderman Diagrams (NSD). Stuctorizer is written in Java and free for any use.
The code has been moved to Github:
https://github.com/fesch/Structorizer.Desktop
IoC container for the configuration and design for experimental design
InPUT offers a descriptive and programming language independent format and IoC (Inversion of Control) container for the configuration and design of computer experiments.
Code and more info can be found on github:
http://github.com/feldob/InPUT
...It has built-in support for TCP, UDP, Serial, MQTT, SSH, Arduino/Raspberry-PI or access to your custom API via HTTP.
Public Homepage: http://pearls-media.com/control-freak/
On Github: https://github.com/net-commander/windows-dist