GTmetrix | Website Performance Testing and Monitoring
GTmetrix is a free tool to test and monitor your page's performance. Using Lighthouse, GTmetrix generates scores for your pages and offers actionable recommendations on how to optimize them.
LGTM - Code Analysis Platform to Find and Prevent Vulnerabilities
Find zero-days and prevent vulnerabilities with LGTM's code analysis platform, powered by the purpose-built QL query language. Get continuous security analysis and automated code review. Free for open-source projects.
Atoms contain the source of truth for our application state. In our todo-list, the source of truth will be an array of objects, with each object representing a todo item.