Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.

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

Bird Eats Bug - Saw a bug? Send an instant replay to engineers. It will come with console logs and everything. Developers will ❤️ you.

ftrace - A function tracer for the Linux kernel.

Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

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