Access to open source BridgePoint and more.
Abstract Solutions
Abstract Solutions offers the iUML tool suite.
Pathfinder Solutions
Pathfinder Solutions sells a model compilation solution that links to existing UML CASE tools
Model Integration
It's impossible to leave Leon out of an Executable UML link list.
One Fact
The Mentor Graphics BridgePoint team now independently maintain BridgePoint. They also manage the xtUML.org website.
H.S. Lahman
Lahman on OO and MDA