OpenLinkProfiler

Provides a wealth of information, actually for free. They link off to a more advanced paid tool, but the amount of data you get for free here is pretty substantial, especially compared to the competition.

While the depth of the analysis might not compare to tools like Ahrefs, for those on a budget, this is a great way to look into your backlinks, or your competitor’s. It includes, still for free, an analysis of the context of the links, including the countries and industries of the sites.