UML Resource Page

The UML® Resource Page of the Object Management Group is the main resource page for all information regarding the Unified Modeling Language (UML).

From the main page you can access UML:
* UML specification for free download
* Standard UML Profiles and related specifications
* Articles about UML
* UML Resource Pages
* UML Tutorials
* OMG’s UML Professional Certification Program
* Lists of UML Tools
* Materials about Modeling Methodologies

http://www.uml.org/