Astah (FKA. JUDE)
Light-weight system design tool supports UML 2.x, Mind Mapping, ERD, Flowchart, CRUD, DFD and Requirement diagrams all in one, works for multi-platform. Comes with three editions, Astah Professional, UML and Community. Astah Community is free to use.
Astah is a system design tool works on multi-platform. There are three editions.
Astah Professional (From $40) : UML 2.x, Mind Mapping, ERD, Flowchart, CRUD, DFD and Requirement diagrams all in one.
Astah UML ($50) : UML 2.x and Mind Mapping
Astah Community : Totally free UML 2.x modeling tool
iPad edition is also available for free. Also diagrams drawn with Astah can be easily uploaded on web browser to share among the team or with clients with Astah Share and Astah Publish (Free)