Dominating set problem I am looking for websites or articles where can I find a data with test graphs for domination set problem. In my heuristic algorithms I use undirected and unweighted graphs. So I search for some graphs which already have been tested from other people.
A quick google search revealed Experiments on Data Reduction for Optimal Domination in Networks. If you look at their tables they cite a number of data sets for which the actual dominating set is given. They also use a number of random graph generators and publish the average dominating set size for these. 

There's another paper from 2002: Experimental Analysis of Heuristic Algorithms for the Dominating Set Problem. I couldn't find an online copy, but I'm sure this paper also documents data sets and actual DS sizes.