Postaga - Generate more backlinks and social shares with effective, automated post promotion and outreach.
Meta Tags - Meta Tags is a tool to debug and generate meta tag code for any website.
Dibz - Put your link building efforts on autopilot
Devhints - TL;DR for developer documentation
Anchor.ly - Anchor.ly - Anchor Text Analyzer
OpenGraph.xyz - Check how search engines and social medias such as Google, Facebook, Twitter display your website