GD Content Tools Pro plugin includes addon for integrating meta boxes into topic and reply forms in bbPress on the front end, allowing your forum users to enter additional data with each topic and reply. Right now, this doesn’t extend to the admin side topic and reply editors.
You can add one or more rules for this integration to cover all forums, or only selected forums, to include one or more meta boxes, to set the location where the meta box will appear, which user types will see the meta box.
The plugin includes a simple and automatic way for displaying data from the meta box inside the topic or reply. But, you can always override the meta display template and display the data any way you want. More on that will be included in the plugin knowledge base.
Currently, meta box is added only to the new topic/reply form. In one of the future versions, the plugin will have integration into the edit topic/reply forms.