Insight.io for GitHub is a browser plugin for GitHub that enables you to navigate and search through repositories like it's in your IDE
Ghost Inspector is an automated website testing and monitoring service. It allows you to easily record or create automated browser tests that check the functionality of your website, then run them continuously from the cloud to catch regressions.
Max Inspect is a Mac app for inspecting Mac apps. It shows you entitlements, code signing, dyld info and more.
AccessLint brings automated web accessibility testing into your development workflow. When a pull request is opened, AccessLint reviews the changes and comments with any new accessibility issues, giving you quick, timely, and targeted feedback, before code goes live.