Are there any deduplication scripts that use btrfs CoW as dedup?

Looking for deduplication tools on Linux there are plenty, see e.g. this wiki page . Allmost all scripts do either only detection, printing the duplicate file names or removing duplicate files by hardlinking them to a single copy. With the rise of btrfs there would be another option: creating a CoW (copy-on-write) copy of a file (like cp reflink=always). I have not found any tool that does this, is anyone aware of tool that does this?