Free meter software for linux

Loadmeter project is a Linux/Solaris system resource monitor that uses very little memory, and is written using raw Xlib.

It monitors:

- Load average
- Uptime
- Disk usage
- Memory usage

In its normal state it displays a window with a coloured bar graph showing the load average for the past minute. This is also shown in digits at the top of the window. both are updated every second. A red notch marks the maximum load since it was started, and can be reset by pressing button2 or hidden with button3. The blue notch shows the 5 minute load average.

By clicking with button1, a pop-up window appears showing the uptime, the capacity of each filesystem, and memory/swap usage. More detailed info on each filesystem is available by highlighting the corresponding one. The way this window pops down is intentional, just to make it interesting.

Any filesystems with higher usage than specified by the -warn option (default 90%) are shown with a (default)green background. The -disk option can also be used as an instant warn feature.

Press Escape in the top level window to exit.

Loadmeter also has the ability to override window managers. Giving the option -override causes the top-level window to have the override_redirect bit set. This is useful for window managers that insist upon decorating standard clients (eg Enlightenment, at least up to DR0.9). If youve given this option, then you can still resize and move the window. During moving and resizing, the cursor displays the geometry.

Ctrl-button1 lowers the window.
Ctrl-button2 raises and moves the window.
Ctrl-button3 raises and resizes the window.
A SIGUSR1 sent to the process will also raise the top level window.

There is also a -parent switch, which can be used to specify another window (in decimal or hex form) to use as the parent for the toplevel one (default is the root). This is useful for banking several together inside another window for easy positioning, etc. The lower function doesnt work if -parent is specified. Also note that you cant use both -override and -parent at the same time.

Command-line options:

-disp < display> Specify which X server to connect to
-geom < +x+y> Specify position on the screen
-sync Call sync() when checking disk usage
-numfont < font> Use for the load digits
-labelfont < font> Use for the hostname label
-popupfont < font> Use for the cursor and popup window
-popupbg < colour> Use for the popup background
-popupfg < colour> Use for the foreground of the popup
-warnbg < colour> Use for the high disk usage warning colour
-meter < colour> Use for the disk usage meter bar
-warn < pct> Min percent capacity reqd to highlight a filesystem
-label < label> Bargraph label to use instead of the hostname
-name < name> Name of the app to present to the WM
-bh < blockheight> Height of individual bargraph blocks (in pixels)
-override Always override window manager
-parent < window> Use as the parent for the toplevel window
-noshrink Dont do fancy popup window shrinking
-disk Show a warning when disk usage exceeds -warn value
-nogeom Disables displaying the window geometry in the cursor whilst moving/resizing the main window.

KCorrMeter is a correlation meter. KCorrMeter is used to display the quality of an audio stereo signal.
Sound engineers will definitely have seen such a tool in the studio and know how to use it.
You can use it to adjust the head of your tape machine. If it isnt mounted in the right angle this will show up.
If you ever wanted to find out if an audio signal is a stereo or mono signal. This is the tool for you.
Non - sound engineers might use it as well and like the visualisation effects.
Enhancements:
- ported to ALSA
- fixed quite a few bugs

Nanowrimo Meter is a Firefox extension that displays progress during National Novel Writing Month (http://www.nanowrimo.org/).

PulseAudio Volume Meter is a simple GTK volume meter for the polypaudio sound server.

Thao_sys_meter is my first Karamba Theme. ... My base theme came from System Theme and Awesome Karamba Theme. Icons came from Crtstal Clear Theme. Thanks to all those autors.
I built it on my Debian etch and with SuperKaramba 0.38
Enhancements:
Added the following:
- CPU meter
- Network meter
- Disk usage meter
- Ram Meter
- Sysinfo

JACK Meterbridge is a meterbridge for the UNIX based JACK audio system.

It supports a number of different types of meter, rendered using the SDL library and user-editable pixmaps.

Supported meters

PPM - Peak Program level Meters

Approximatly conforming to BS 6840-10. These meters are designed to indicate peak amplitude, as opposed to VU meters which are designed to indicate volume.

The scale is correct according to the standard, 4 equates to 0dB, 1 to -12, 7 to +12, and it is linear with decibels.

Ive never used a real PPM meter, so I dont know if it reacts correctly. Feedback welcome.

VU - Volume Unit meters

Conforming to BS 6840-17:1991. Real meter is larger.

These meters are designed to measure the "volume" of an audio signal, it is not as relevant to digital systems as PPM meters, but is useful if you are interfacing to analogue tape, FM broadcast equipment or want a general idea of the signal volume.

The -r flag (set reference level) is usful with these meters as it will allow you to calibrate to your DA converters. The meter is pre-adjusted so that it should allign correctly calibrated DA converters with analogue systems. If you wish to run with 0dBFS = 0dBu then use "-r 20"

DPM - Digital Peak Meter

Conforming to IEC 268-18:1995 (peak indiciator decay may not be correct).

These are meters as typically seen on digital consoles, HD recorders etc.

There are the most efficient in screen realestate and CPU use but look a bit boring.

JF - "Jellyfish" Meter (aka. Goniometer)

A jellyfish meter is a stereo scope display, it can be used to spot phase and mono compatibility problems.

Some charateristic problems can be seen, eg. a signal with a stronger left channel is seen as a shape sloping to the left [], more right slopes to the right [/], and dead mono is a vertical line [|].

The meter below the scope display indicates the degree of stereo correlation between the channels, a value of +1 means that it is perfectly mono compatible, and -1 and that the channels are in anti-phase (so they will cancel out if mixed).

If someone has better examples, please mail them to me, there are probably tutorials online.

SCO - Scope

A rendering of an oscilloscope display.

It has a basic trigger function, but there is no timebase control. It renders one pixel per sample, so it will probably be next to useless at 96KHz

Bulk Meter Flow and Operations provides a Web-based application to manage water meter readings.