Link Whisper - Building smart internal links just got easier
Postaga - Generate more backlinks and social shares with effective, automated post promotion and outreach.
WordPress Internal Link Optimiser - A internal link optimiser and finder tool for WordPress SEO
Shortlist Metrics - A simple tool to help you scale your link building faster
LinkStorm - Optimize your internal linking
Curatedseotools.com - Curated directory of the best SEO tools.