From the official Sopcast Forum:
So have fun, updates will follow here if needed :DYou can download the Linux client sp-sc now. We are busy working on the system failure, so the release of Linux verion is late, sorry.
Please read the Readme file in this package, about the usage and library dependency.
If you need the stdc++5 library, download it here:
Note: No need to download the libstdcpp5.tgz if you can run sp-sc.
Some friends are working on the GUI now, so wait for some other days for a full GUI version.
Thanks and enjoy it.