I use mostly Entity-Relationship for designing a database, and UML Class diagrams. Personally I prefer typing to drag-and-drop so I use https://www.gleek.io/ h

I use mostly Entity-Relationship for designing a database, and UML Class diagrams. Personally I prefer typing to drag-and-drop so I use https://www.gleek.io/ https://www.gleek.io/ Check templates and turials, or ask me if you like to know more ;-)