As cybersecurity becomes increasingly important in software development, the “shift left” security approach is widely recognized as a best practice for ensuring superior application security. Numerous traditional security firms are introducing shift-left products and capabilities, and the concept is gaining traction. However, some open source application security tools are more developer-friendly than others. That’s why we’ve compiled a list of five security tools that we believe developers should be aware of, providing a brief overview of the top open-source software and explaining why we consider them to be developer-friendly.