Diagrams
Sebastian is built on top of the award-winning, open-source diagramming and charting tool Mermaid.
If looking for a simple way to store for free unlimited diagrams, Sebastian is the right place. You can create, edit, and share your diagrams with your team or the world. It's easy to use and free.
Notes
Create notes and store them in Sebastian.
Projects
Combine Notes and Diagrams in Projects and share them with your team.