Total Commander

Using the lan plugin the first time, you have to enter the IP addresses of your LAN workstations (PC)

Using the "ES File manager", you have the possibility to click on "search" and after a few second all PCs in the LAN are visible.

I do not know how this is done, but it would be nice to have in TC.

Unfortunately I could not get this to work when the workgroup name is unknown. When you know the name, you can list servers by specifying the following in a connection:
/yourworkgroupname