libxmmsclient++4 from multimedia:audio:xmms2 project
Select Your Operating System
Add repository and install manually
For Fedora 23 run the following as root:
dnf config-manager --add-repo https://download.opensuse.org/repositories/multimedia:audio:xmms2/Fedora_23/multimedia:audio:xmms2.repo dnf install libxmmsclient++4