A very simple Gopher server written in Go. Although not very featureful, it is functional and secure to the best of my knowledge.
One feature it does have is hostname and port interpolation. Rather than entering literal hostnames and ports in all your gophermaps, you can use \host and \port and the server will substitute the actual hostname and port it is listening on.
Just run go build.
Usage: gogopher [-?s] [-h hostname] [-p port] [-r root] <address>:<port>
Options:
-?, --help Print this help message
-h, --host Hostname to use for interpolation
-p, --port TCP port to use for interpolation
-r, --root Directory to use as root
-s, --strict Do not perform interpolation (host, port, etc.)
-b, --block Name of file containing list of blocked IP addresses
-l, --log Name of file to direct logs (default is stdout)