XRG!

System Explorer is an enhanced Taskmanager that provides detailed information about running processes, startup programs, IE add-ons (BHOs), drivers, services network connections, system resources and more. It also keeps track of a history of processes that were started, and allows you to create file and registry snapshots that can be compared to analyze system changes in detail. System Explorer integrates online lookups into the right click menu for any process, driver or service, allowing you to retrieve additional information (and virus checking) from online sources including Google. »

iStat is a series of system monitor apps. It's available in different versions: iStat Menus, iStat for iOS and iStat Server as a companion application to the iStat for iOS app that lets you remotely monitor your computers (free for Windows and Mac).

This is a port to OS X El Capitan 10.11 of MenuMeters by Alex Harper.

Mac OS X System Monitor and Process Explorer ToolatMonitor is the most advanced monitoring tool for Mac OS X that displays system activity in real-time. It is designed to allow quick assessment of computers state and it is powerful enough to make it a core utility in anyones system troubleshooting toolkit.atMonitor offers a better alternative to Apples own "Activity Monitor" and combines the best of the features of many other existing monitoring utilities. It also adds an extensive list of unique features of its own. In addition to the standard CPU, GPU, VRAM, FPS, Disk and Network info, atMonitor allows interaction with processes, setting up triggers, logging, purging RAM and much more. atMonitor can be displayed in the menu bar, as a stand alone floating window or in the dock icon. »

The BitBar app lets you put the output from any script or program right in your Mac OS X menu bar. And it's completely free. An impressive number of plugins have already been contributed by a wide range of developers just like you, and this site makes it easy to find them.

MiniUsage displays various data like CPU usage, amount of network flow, battery status and process names which uses much CPU time in a menubar. It takes little space and can display various data, so it's suitable for notebook.

Monitor numerous OS X statistics including: CPU activity System load over time Network bandwidth and activity Memory activity and usage Battery & wireless signal strength Disk usage Current time and date Compact, clever & fully customizable user interface Presents information both graphically and with text Beautiful on Retina display Fits in perfectly with the new system appearances Save & load custom appearances Minimizes impact on system performance View data on the desktop, in the menu bar or Dock Show & hide windows using system hotkeys »

Explore all the tasks (processes) running on your Mac with TaskExplorer.Quickly see a task's signature status, loaded dylibs, open files, network connection, and much more!

SystemPal is becoming an ALL-IN-ONE app. It is the best tool to monitor your memory/CPU usage status, CPU temperature and fan speed, network speed. It also provides a tool kit including mini music player, screen shot utility, memory cleaner.

This utility allows you to monitor a various system info in "always on top" floating window (overlay mode).Available features:- CPU Usage meter- Free RAM meter- CPU Frequency indicator- 2g/3g/Wi-Fi Traffic meter- Battery Level- Battery Temperature- Battery Current (mA)- Wi-Fi Signal Level- I/O Activity- Time/Date indicator- GSM Cell Signal Level (Samsung Galaxy S2 and Galaxy Note are not supported due to firmware bug!)- Number of fixed GPS satellites- SD Card free space- Most resource-intensive processes- Task Killer- Audio VU and visual equalizerAlso there is nice real time graph on background. Press Show Panel button to enable dashboard. You can drag floating window over the screen or double tap to open settings. See video and screen-shots for details.This application allows you to:- Easy diagnostic problem processes that consume resources excessively.- With Cool Tool you can monitor full-screen applications (games, video players, browsers).- Monitor your Internet traffic without closing the browser window.- Make your battery level always visible, with accurate percentage scale.- Monitor how good your CPU governor switches between CPU frequencies in idle/stressesDon't forget to try custom themes!Tips:Customize the appearance of the panel using color picker dialogs. Also you can adjust transparency and size of the panel in Sliders section.If you want the panel did not receive touch events, just select the "ICS hack" box. If you Android 4.0 user, you also may want to turn it on. Since in ICS the status bar is drawn on top of all. Even on top of Cool Tool:)Tons of gauges could drain your battery very quickly. Uncheck the features that you do not need. Btw, Cool Tool went to sleep and do not draw anything when your display turns off. It is for powersave.Warning! "Show most resource-intensive process" feature is pretty resource-intensive :) You should use it only if you really need it.If you want to hide Cool Tool panel in sp »

Easily Monitor Your Mac's System Stats.

Magican Lite is a free system monitor utility.

Monity is an advanced system monitor that takes place in macOS Today View and oversees component statistics.