Activity-Diagrams is an app that allows you to create activity diagrams. The main use case is to model a diagram that represents combinational logic in digital systems and generate corresponding SystemVerilog code.
The app is written in Angular and uses JointJS library for diagramming.
The are a few diagram examples in the diagram-examples folder in JSON format. You can upload these files to the app to load the diagram.
Activity-Diagrams app
JointJS tutorials
JointJS API documentation
Feel free to contact me anytime if you have any questions or comments.