The Online Circuit Builder
bool is an web-app that allows users to drag-and-drop circuit components. Allowing users to visual the flow and logic of a boolean circuit.
Front End Demo: http://nelnel33.github.io/bool/
Full Demo: http://5-dot-bool-163515.appspot.com
Adder: http://5-dot-bool-163515.appspot.com/workspace/nelson.tsui@stonybrook.edu/fulladder
Documentation: https://nelnel33.github.io/bool/doc/bool-doc.pdf