I recently updated the popular Chamfer Maker plugin so it works with CINEMA 4D R15.
You can download the plugin at the end of this post.
The ZIP file includes pre-compiled plugins for CINEMA 4D versions R12 through R15.
There are a few changes to the old version but that is best explained in a video.
You can find the source code for the plugin on github.
Revision 2 (r2) adds support for live edge selection from a correction deformer that is put under the modified object.
As seen in the following screenshot: