UML (edit)

• UI Mockups
• Entity Relationship Diagrams
• Web Mockups

Offline:

Diagram Designer: https://diagram-designer.en.softonic.com/

Dia: https://dia.en.softonic.com/

Pencil: https://pencil-project.en.softonic.com/

Online: 

https://creately.com 

UML Tools

astah Community Edition

Modelio

StarUML

Enterprise Architect

Lucidchart

astah Community Edition Các phần mềm thay thế và phần mềm tương tự - ProgSoft.net