WhiteStarUML - WhiteStarUML is a fork of StarUML with an intent to revive its Delphi code base by updating code to...
Dynamic Draw - A Powerful idea processor.It's Open Source and Freeware.
Topcoder - The Topcoder home page has received a slick new makeover that lets new customers quckly login, discover the power of our community, and launch challenges.
SEQO - SEQO generates UML sequence diagrams from a simple text.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Yuml.me - Yuml.me is a legit modeling tool that comes with the strategic measure that let teams and individual create diagram more quickly via simply typing plain text.