GeneWeb is a program that I mainly use to show relationships between my relatives.
The program can show the connections between persons graphicly, eventhou they are related thru marriages and relations to the spouses family members.

I import data frommy DISGEN database via a GEDCOM file, this works very well.

The program can do may other things that I don't use. It is simple to install and run localy on your PC for your own use  or to install on a server for use over Internet. The server installation requires, as far as I know, that you start two services on the server.