IceClean is a powerful System Maintenance and Optimization Tool using only UNIX built-in System Tasks to help your Mac stay healty and to keep it running smoothly.

Features:

• Full Manage Spotlight Indexing
• Quick & Full CD/DVD Erase
• Full System Profiler
• Advanced System
• Maintenance & Cleanup
• Dashboard On/Off
• Network State & Traceroute

Maintenance Processes
• Periodic Routine Scripts: Mac OS X performs background maintenance tasks at certain times if the computer is not in sleep mode. If your computer is shut down or in sleep at the designated times, the maintenance does not occur. In that case, you may want or need to run these manually.
• Update Prebindings: Prebindings allow applications to launch faster. With 10.4 or 10.5 your prebindings are updated every time you run an Apple Installer.
• Verify Preference Files: Sometimes Preferences Files (.plist) become corrupt. You should verify your preferences whenever your applications unexpectly quit or something crashes.
• Repair Permissions: Most users of Mac OS X have not intentionally modified privileges and simply need a utility to reset system privileges to their correct default values. Mac OS X incorporates a subsystem based on a UNIX-style operating system that uses permissions in the file system

Clear Caches
• Even though running the routine maintenance scripts clears out some temporary files, none of the system caches are touched by them. So it is a good idea to occasionally also use a utility that trashes the system caches, and occasionally your Internet browser caches. Deleting caches won't hurt anything.
However, over time a cache speeds up your computer (assuming that you do some things repetitively), so if you aren't experiencing any problems, you may want to leave your caches alone. On the other hand, if it has been ages since you have flushed your caches, or if your computer is running slowly, or if you are experiencing odd problems, it might be a good idea to flush them.

Network Utilities
• Traceroute: The Internet is a large and complex aggregation of network hardware, connected together by gateways.  Tracking the route one’s packets follow (or finding the miscreant gateway that’s discarding your packets) can be difficult.  Traceroute utilizes the IP protocol ‘time to live’ field and attempts to elicit an ICMP TIME_EXCEEDED response from each gateway along the path to some host.
The only mandatory parameter is the destination host name or IP number. The default probe datagram length is 40 bytes, but this may be increased by specifying a packet size (in bytes) after the destination host name.

Netstat
• The netstat command symbolically displays the contents of various network-related data structures.  There are a number of output formats, depending on the options for the information presented.  The first form of the command displays a list of active sockets for each protocol. The second form presents the contents of one of the other network data structures according to the option selected. Using the third form, with a wait interval specified, netstat will continuously display the information regarding packet traffic on the configured network interfaces.  The fourth form displays statistics for the specified protocol or address family.  The fifth form displays per interface statistics for the specified protocol or address family.  The sixth form displays mbuf(9) statistics.  The seventh form displays routing table for the specified address family.  The eighth form displays routing statistics.
• Whois: Internet domain name and network number directory service.The Whois utility looks up records in the databases maintained by several Network Information Centers (NICs).

Requirements:
OS X 10.5 - 10.6
Intel

Also available are:
Version 3.4.8 for PPC
Version 2.5 for OS X 10.4