'domain' is DNS, as is 'rndc'. 'ssh' is obvious.
As dfctve_end_user says, Webmin is a top piece of software for admining UNIX servers. It's default port is 10000, so that probably explains those listings.
I don't know what is running on UDP port 724 - that isn't an officially registered port number. Try Google or:
The first column lists the actual name of the program using the port.