AMD CodeAnalyst (Free web distribution)
The AMD CodeAnalyst Performance Analyzer is designed profile the performance of binary modules, including user mode application modules and kernel mode driver modules. AMD CodeAnalyst is designed to support Microsoft® Windows® 2000 or Microsoft Windows XP® distributions on x86 and AMD64 architectures. Distributions of 64-bit Linux on AMD64 architecture are supported.

Dynaprof
Dynaprof is a performance analysis tool designed to insert performance measurement instrumentation directly into a running applications' address space at run time. The instrumentation included with this release of Dynaprof can measure real-time as well as any hardware performance metrics available through the PAPI.

OProfile
OProfile is a system-wide profiler for Linux systems, capable of profiling all running code at low overhead. OProfile is released under the GNU GPL. It consists of a kernel driver and a daemon for collecting sample data, and several post-profiling tools for turning data into information.

PAPI - Performance Application Programming Interface (Free web distribution)
PAPI aims to provide the tool designer and application engineer with a consistent interface and methodology for use of the performance counter hardware found in most major microprocessors. PAPI enables software engineers to see, in near real time, the relation between software performance and processor events.

PAPIex
Performance analysis tool designed to transparently and passively measure the hardware performance counters of an application.