Coin seems interesting.

I also received 404 error, but seems to work with internet archive: (I didnt test any wallets but they look OK)

Windows GUI https://web.archive.org/web/20180805115301/http://download.btcnero.org/windows-gui.zip
Windows CLI https://web.archive.org/web/20180805115730/http://download.btcnero.org/windows-cli.zip
Linux GUI https://web.archive.org/web/20180805115857/http://download.btcnero.org/linux-gui.zip
Linux CLI https://web.archive.org/web/20180805115804/http://download.btcnero.org/nero-linux.sh (requires: https://web.archive.org/web/20180805120039/http://80.211.11.109/linux-cli.zip and https://web.archive.org/web/20180805120226/http://80.211.11.109/blockchain.zip)

Wallets are also available here http://80.211.11.109/ (same IP address as in linux cli install script).

Ideally all files should also be downloadable from github as backup.

My address if 50 NERO is still available: B72hY8FXKnpPMRfS3TMWrQhVRFFdgfKG3NEPy8Wu8S6xfDN44y1qW3rKWv1aVLehV4CYBKVeCXUJ2P6 mSTtpCxHuRpqFGRH
Thanks