Laurent Broudoux Blog - Building and applying UML profiles with Obeo UMLDesigner
UMLDesigner (see http://marketplace.obeonetwork.com/module/uml) is the “new kid of the block” in the Uml designers family. Based on Eclipse tooling, the solution is backed by Obeo a french enterprise behind the Eclipse Modeling initiative. It is definetely the solution to consider if your want a lightweight designer integrated into your development stack.