Most interesting in System Optimization

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

Top rated in System Optimization

OpenMark

OpenGL benchmark for Mac OS X.

Jitouch
Free

Add new gestures to the trackpad and Magic Mouse.

iBored
Free

It is basically a hex editor for disk sectors, but can also be used to edit files, including disk images.

Vicomsoft FTP Client
Free

Access and manage FTP server content on a Mac.

MemoryStick
Free

Memory Stick is a Mac OS X utility to view RAM usage, allowing users to optimize performance and ensure they have enough RAM for their tasks.

XShelf
Free

XShelf is for drag and drop in MacOS X letting you "pause" the operation.

WinShortcutter
Free

Create a Windows-like office environment.

TechTool Pro 13
Free

Test and repair your Mac to keep it running at its best.

CustomShortcuts
Free

Customize shortcuts for your operating system and applications.

iGlance
Free

Displays your system current stats in the menu bar of your Mac.

Access Menu
Free

Access the startup disk's folders from the menu bar.

AutoSwitchInput
Free

Automatically switch the input according to different running applications.

WeClean
Free

Boost your Mac's performance by removing junk files.

TechTool Pro 12
Free

Test, optimize, repair and recover data on your Mac.

DiskMaker X Pro
Free

Restore any OS in a few clicks with a multi-macOS installation disk.

LaunchPanel
Free

Open from one place your favorite apps, files, and folders.

Mission Control Plus
Free

Manage your Mac's windows with keyboard navigation, shortcuts and more.

MTMR
Free

Customize the TouchBar of MacBook Pro with custo buttons.

Mac-Auto-Fixer
Free

Protect your Mac against malicious contents and clean junk files.

xattred
Free

View and edit the attributes of personal files from MacOS.