● Ahrefs Backlink Checker Free version of Ahrefs' backlink checker tool.

● Open Link Profiler Fast backlinks and a lot more info worth investigating.

● Check My Links Chrome plugin to check pages for broken links.

● Search Queries for backlink prospecting

● Guide to getting backlinks Lots of great ideas for obtaining a good link or two.

● Help A Reporter Be a reference for reporters looking for answers.