Top rated in System Optimization

Smaart
7.4.2.2
Complex sound system measurement application.
ShadowKiller
1.2
FREE
ShadowKiller removes window and menu shadows in MacOS X.
MacMaintenance
5.1
FREE
Get access to various system settings to boost up the performance of your Mac.
QaLL
2.1
FREE
Mac program that shuts down running apps.
Trash X
1.9.5
Very easy to use trashcan tool for Mac OS X.
MenuMeters
1.9.7
FREE
System monitoring tool for Mac computers.
SpeedTools Utilities
3.9.1
The SpeedTools Utilities consist of a suite of utiliies managed by an application which controls the launching......
MacCPUID
3.0
FREE
Get detailed information about your Mac's processor.
PseudoAnacron
1.5.1 - 2005-8
FREE
OS X does some periodic maintenance tasks at specific times.
MiStat
1.3
Keep an eye on all your Mac's vitals with MiStat...
Deskovery
3.1
Change the size and position of your desktop windows.
Exhaust
0.3
FREE
Manage your login items in a very simple manner.
Witch
4.2
Switch directly between not only applications (as you can...
UpdateMenu
1.0
FREE
It is a program that keeps your applications up-to date.
Startupizer 2
2.3.1
This app helps you manage login items on your Mac.
MacInside (Beta)
1.0.0d0
FREE
It contains information about processes and application running on your Mac.
Drive Mounter
1.6.1
Connect your network drives only once!
Purger King
1.1.1
FREE
Strongest and simplest memory cleaner.
Appsolete
8.0
FREE
Nice system utility that can help in your switch to OS X Lion.
Purge
1.12
FREE
First free RAM optimizer for Mac OS X.
iconXprit
3.7
Basically a background icon tool to provide a Finder service.
Flush Memory
2.1.1
Must-have tool that will free up RAM on your computer.
More Memory
1.3.1
Take control over your RAM usage.
SixtyFour
1.7.4
A memory optimizer that opens 64-bit apps in a 32-bit mode.
TmpDisk
1.2.1
FREE
Simple Open-Source RamDisk management tool.