The TopLeaf Plugin for oXygen adds the publishing power of TopLeaf to the author/editing capabilities of the oXygen editor. The result is a full featured out of the box DITA publishing tool.
Download the plugin installer.
First install TopLeaf. You can download an evaluation copy here.
You must also have one of the oXygen editor products installed.
Run the TopLeaf Plugin installer.
A tutorial on installing and using the plugin can be viewed here.
For more information and usage instructions see the TopLeaf for DITA Guide.