What are some quality graph libraries for C?

Question

I am writing several Cs where I will need to store a very large graph as an adjacency matrix. I was going to hack a quick graph implementation, but first wanted to ask if there are any good graph libraries for C (not C ++) that people like.

I'm going to import the chart in some standard format (maybe GML, but this is not a make or break requirement), save it as an adjacency matrix, and then do some calculations.

Any thoughts?

Thank!

EDIT: like FYI, I'm not at all interested in drawing a chart

Answer 1

igraph. GML.