I am studying graph algorithms.


I need a database of graphs on which I can test my algorithms. 


Where can I find a reliable database of graphs of all kinds?


Thanks!



Where on the internet I can find a database of graphs?
You might want to look at Donald Knuth's *Stanford GraphBase: A Platform for Combinatorial Computing* (1994, 2009) and the accompanying [website](https://www-cs-faculty.stanford.edu/~knuth/sgb.html). 


See also [The Stony Brook Algorithm Repository](http://www.cs.sunysb.edu/~algorith/).


