Most interesting in System Optimization

Free
It delivers hardware diagnostics, drive repair and daily maintenance.
Free
Magican helps you improve the performance of your Mac.
A program for monitoring your Wi-Fi network strength.
Free
Provides MacOS users a way to run X Window applications.
It is designed for mutiple audio tasks:record live performances.

Top rated in System Optimization

Marathono
Free

Marathono helps you manage long-running processes in Mac OS.

Doom CPU Monitor
Free

It shows you how much you're crushing your CPU via the DOOM face.

Cooler Controller Pro
Free

Cooler Controller Pro for Hackers helps you to monitor you system fans.

Snapdragon Profiler
Free

Free Mac OS software for analyzing performance bottlenecks on Android devices.

DiskActivity
Free

DiskActivity is a visual indicator to see when the drive is being accessed.

Free Space
Free

Free Space is a free space monitor and 1-click ejector.

Classic Find
Free

Classic Find lets you scan specific drives or volumes.

Liquid | Flow
Free

Liquid | Flow (legacy) offers a fast and convenient way to use your Mac.

Tinted Window
Free

Free utility to tint part of your main display & magnify it.

Parallels Toolbox
Free

Developed by Parallels

MaCPU Monitor
Free

This application helps you check the CPU usage of your Mac.

libimobiledevice
Free

Talks the protocols to support iPhone, iPod Touch, iPad and Apple TV devices.

AppStarter
Free

Categorize all of your favorite applications in one place.

FileCat
Free

Connects the files of a folder into a single file to print source files easily.

DiskTest
Free

Tests the write speed of your Mac hard drive device.

FITS
Free

Identifies, validates, and extracts technical metadata for various file formats.

Remove Office 2011
Free

Uninstall Microsoft Office 2011 with just a few clicks.

DBAN
Free

Self-contained boot image that securely wipes the hard disks of most computers.

JVerify
Free

Designed to monitor for changes in any file on your system.

OS X Bash Update
Free

Fixes a security flaw in the bash UNIX shell on OS X 10.9.5.