Cocktail is something of a mixture of a program, offering a combination of both system maintenance tools and system tweaking. The Pilot element of the program allows for automatic cleaning, repairing and optimisation of your Mac, running a variety of maintenance scripts on a schedule to save you from having to do so manually.
The remainder of the program is divided into five main sections. In the Disks section you can access journaling setting for your drives, monitor SMART information and change and repair disk permissions. Moving to the System section you have access to a number of handy system tweaks such as changing startup mode and adjusting Time Machine Backup settings.
The Files section contains a huge number of options including the ability to track down corrupt files, delete logs and caches, eliminate malware and the option to delete files that are locked. In the Network section you can settings for your network card to help boost performance, and configure a file sharing server.
Finally, the Interface section enables you completely take control of the appearance of Snow Leopard, changing the look and feel of Safari, Expose, the dock and Finder. Cocktail really is a mixture of tools, but if you're looking for a program to help you maintain and customise your Mac, this is the program for you.
Cocktail comes at a great price and offers a great balance between a dedicated tweaking tool and maintenance utility.