strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
The Security Checklist - The Practical Security Checklist for Web Developers
ftrace - A function tracer for the Linux kernel.
iCompaas - Cloud infrastructure Compliance, CyberSecurity and Cost Saving as-a-Service
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
Signed Pages - A browser extension to verify the authenticity of websites