There‘s also Amarisoft, which does it in „real time“ in software, but not open source. I believe srsLTE, used to turn SDRs into eNodeB/UEs, adds support for 5G

There‘s also Amarisoft, which does it in „real time“ in software, but not open source. I believe srsLTE, used to turn SDRs into eNodeB/UEs, adds support for 5G soon (tm).