strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.

Codex​​ - Codex is a VS Code extension that allows any engineer to attach comments, questions or any kind of content to specific lines of code.

ftrace - A function tracer for the Linux kernel.

Figstack - Your intelligent coding companion

Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.

WeWeb - WeWeb empowers anyone to build a professional looking website in minutes. It is based on components developers can easily customize.