Free enterprise architect uml 2.1 software for linux

SDE for NetBeans is a UML modeling environment tightly integrated with NetBeans.
It lets you draw all types of UML diagrams (use case diagram, class diagram, sequence diagram, activity diagram, etc.) in NetBeans, reverse source code (Java, C++, XML, XML Schema, CORBA IDL, etc.) to UML models, and generate Java source from UML diagrams.
SDE for NetBeans Community Edition features a Rational Rose importer, an XMI importer, HTML/PDF documentation generators, and plug-in and template support.
Enhancements:
- Branch and tag capability was added to the VP Teamwork Server with Subversion and CVS repository integration.
- This allows different modeling projects to be run in parallel while keeping the release quality project stable in the trunk.
- A user interface designer was introduced for creating screen mock-ups in the early stages of a software development project.
- Usability of the sequence diagram was increased.
- There were also a number of enhancements for various other features.

Blackbird Enterprise Service Bus is the first enterprise service bus (ESB) for PHP developers. The project provides a run-time container that loads, manages, and executes classes, provides connectivity and utility services to access external resources, such as message queues and collects and exposes metrics data to management tools
Main features:
- Use PHP to rapidly develop applications and application integration services
- Easy to learn and use - get coding in minutes
- Written for developers by developers
- Command-line and protocol-driven management and monitoring
- Easy object configuration, deployment, and load/unload tasks
- Less memory usage than a Java ESB
- Metrics collection, making it easy to develop monitoring and management tools
- Extensible protocol handler layer - supports STOMP , SMTP, and Jabber out of the box
What Its Not:
- A full-blown, Java ESB like Apache ServiceMix
- A replacement for other middleware, such as Apache ActiveMQ
- As fast, in theory, as a compiled language (although see below)
- Fully object-oriented (because PHP is not)
- Written by architects for architects
Why Are You Doing This When Already Exists?
ITema provides managed, hosted applications to small businesses, with an emphasis on integration. Part of our vision is to offer our customers choice, so they arent locked into a specific product or vendor. We need very good integration technology or well end up with an unmanageable spider web of integration hooks. An ESB is tailor-made for this type of work. It gives us the loose coupling we need to let applications run independently, and handles grunt-work tasks like communicating via message queues so we can focus on writing the code that does the real work.
The available Java ESB products didnt meet our needs. PHP was a more natural choice, but there was no ESB available for it. We decided it was better for us to write what we needed than to try to shoehorn what we were doing into another product. Our hope is that by releasing Blackbird under the GPL, other developers will get as much out of it as we have.
Blackbird isnt intended to be an isolated project, or a replacement for a Java ESB. In fact, we anticipated that it could be very useful to use both a Java and PHP ESB at the same time, in different layers of an architecture. Blackbirds design makes this straightforward, and it expects to communicate via STOMP with a message queue such as Apache ActiveMQ. It can even use the same ActiveMQ instance that supports a ServiceMix environment, so writing a Blackbird component to communicate with a ServiceMix component is easy!