GNU Xnee is a suite of programs that can record, replay and distribute user actions under the X11 environment. Think of it as a robot that can imitate the job you just did.

Xnee can be used to

Automate tests - e.g nightly automatic regression tests
Demonstrate programs - e.g record and replay a user interaction with your [...]

bwm-ng can be used to monitor the current Bandwidth of all or some specific Interfaces. It shows total of in and out as well as total of all Interfaces. Several different output methods are supported (curses, plain, csv and html). bwm-ng is not limited in the number of interfaces and can handle new ones dynamically [...]

Sysprof is a sampling CPU profiler for Linux that uses a kernel module to profile the entire system, not just a single application. Sysprof handles shared libraries and applications do not need to be recompiled. In fact they don’t even have to be restarted.
Just insert the kernel module and start sysprof.
Features

Profiles all running processes, not [...]

The goal of the frysk project is to create an intelligent, distributed, always-on system monitoring and debugging tool that allows developers and system administrators to monitor running processes and threads (including creation and destruction events), monitor the use of locking primitives, expose deadlocks, gather data and debug any given process by either choosing it from [...]