-A highly configurable date, time and calendar for your menubar, including fuzzy clock and moon phase. A world clock with sunrise, sunset, moonrise and moonset times for over 20,000 cities. It’s one of the most powerful replacements for Apple’s date and time menu available.
Disk Usage

-See used or free space for multiple disks in your menubar. More detail for all your disks is only a click away.
Disk Activity

-Detailed disk I/O in your menubar, displayed as a graph, a variety of different read and write indicators, or both.
Sensors

-Realtime listings of the sensors in your Mac, including temperatures, hard drive temperatures (where supported), fans, voltages, current and power. Fan speeds can be controlled, with different rules when on battery power, if you’d like.
Battery

-Detailed info on your battery’s current state and a highly configurable menu item that can change if you’re draining, charging, or completely charged.
Memory

-Memory stats for your menubar, shown as a pie chart, graph, percentage, bar or any combination of those things. The memory dropdown menu shows a list of the top 5 memory hogs, as well as other useful info.
Complete control

-Each menu extra comes with many different display modes, customizable colours, font sizes and widths.

What's new in this version:

* Added support for fan speed control on 2010 iMacs.
* Added support for Magic Trackpad in the battery extra.
* Added optional shadows for bandwidth text.
* Added day of year and week of year tokens to menubar date formatter.
* Improved sensor monitoring on 2010 iMacs.
* Sunrise and sunset info now uses 24-hour time if world clocks use 24-hour time.
* Fixed bugs with fan speed control after wake.