Hello. I need help to find the best module (ready-made scripts), of a facebook like comments section were users can add comments in a box. It is for a web application. Open source or commercial doesn't matter.

I also need this module to support file upload, in connection with the comments. The file upload should support drag-and-drop into the box. Example...

[ 2012-06-12: Peter Smith ]
Hello. This is another comment example.
[ ] Uploaded file2.pdf

[ 2012-06-10: Jenny Hammer ]
Hello. This is a comment example.
[ ] Uploaded file.pdf

Does anyone have any idea which module is the best to use ?

Thank you