Lista de ferramentas:
Astah Professional (com e-mail de aluno dá pra conseguir licença de estudante) (https://astah.net/downloads/)
Visual Paradigm (https://www.visual-paradigm.com/)
EdrawMax (https://www.edrawmax.com/)
LucidChart (https://www.lucidchart.com/pages/pt/exemplos/uml-online)
YUML (https://yuml.me/)
Creately (https://creately.com/)