If you've never used Terminal to execute commands and perform tasks on your Mac then CLIX is a good starting point.
CLIX provides over 1,000 system commands for investigating your system status, cleaning out the junk files, accessing hidden Dock settings, and other tweaks related to Finder, Spotlight, Dashboard, Exposé, and many more. The advantage of this is that it's quick, requires no third party application, and there's no danger of crashes.
In reality though, CLIX can be a little tricky to master. If you're used to a GUI for administering your maintenance programs and have never used Terminal, then you might find yourself a bit lost. This is particularly true if you've never used the 'Sudo' command , which some commands require before executing.
Commands in the files are divided into categories such as Clean, Disk, Dock, Finder, Global, Log, Network, Purge, Safari, and System. Each command has a title and a description which you can browse through, until you find something of interest and then double click to bring up the command console. All you have to do is hit the 'Run' button then hit 'Stop' when you want to stop it.
CLIX offers a handy introduction into using UNIX and Terminal, although if you're just looking for an easy-to-use maintenance tool, it's probably not the best choice.
