X Overload is an application with a collection of useful utilities that lets you manage and maintain your Mac OS X and classic system folder. Here are some of the key things you can do with X Overload.

Manage items in Mac OS X
Allows you to manage Contextual Menu Items, Fonts, Preference files, Preference Panes, Services, Screen Savers located in the library folders in Mac OS X.You can also find out more information about Frameworks and Kernel Extensions.

Manage items in Classic System folder
Allows you to manage Apple Menu Items, Contextual Menu Items, Control Panels, Control Strips Modules, Extensions, Fonts, Startup Items, Internet Plug-ins located inside Classic system folder. You can also search or browse the database for error codes

Delete unnecessary localization language files
A lot of programs come with few localization language files for the user interface, you probably need 1 or 2. If you only keep the localization language files that you need. You can easily reclaim more than 150MB from a clean Mac OS X install. You can use the extra HD space to store your favorites music, movie clip and so on.