Free calculates software for linux

calcamp is a program that calculates with what factor an audio-sample should be amplified to get maximum volume. Usefull, for example, when used with the pvf-tools (included in the mgetty package). This program needs libSndFile.

Instruction for usage:

calcamp file_in
or
... | calcamp

IPC is a program that calculates the isotopic distribution of a given chemical formula. It gives the rel. intensities and the propability of the masses belonging to a molecule ion, fragment or whatever is represented by the given chemical formula.
Furthernmore it can use GNUPlot to visualize the result. Only masses with a rel. Intensity bigger then 0.009% are shown. Additionaly ipc prints the overall number of peaks and the needed computation time.
The program uses an algorithm which computes the exact isotopic distribution. This leads to a large number of peaks which have very low rel. abundances. Even for a small molecule as Acetylsalicylic acid ( C9H8O4, Mr=180.15) there are 1350 peaks but only nine of them have a rel. abundance higher then 0.01%.
Enhancements:
- A complete list of elements and isotopes is now used.
- The list of elements is taken from the NIST.

ipcalc project takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range.
By giving a second netmask, you can design subnets and supernets. It is also intended to be a teaching tool and presents the subnetting results as easy-to-understand binary values.
Enter your netmask(s) in CIDR notation (/25) or dotted decimals (255.255.255.0). Inverse netmasks are recognized. If you omit the netmask ipcalc uses the default netmask for the class of your network.
Look at the space between the bits of the addresses: The bits before it are the network part of the address, the bits after it are the host part. You can see two simple facts: In a network address all host bits are zero, in a broadcast address they are all set.
The class of your network is determined by its first bits.
If your network is a private internet according to RFC 1918 this is remarked. When displaying subnets the new bits in the network part of the netmask are marked in a different color
The wildcard is the inverse netmask as used for access control lists in Cisco routers.
Do you want to split your network into subnets? Enter the address and netmask of your original network and play with the second netmask until the result matches your needs.
You can have all this fun at your shell prompt. Originally ipcalc was not intended for creating HTML and still works happily in /usr/local/bin/
Enhancements:
- This release fixes a cross-site scripting vulnerability in the CGI wrapper script.

interfaceTrafcalc calculates the size of the TCP-payload on a system via packet capturing and connection tracking at the user level instead of the IP level.

The program uses a pcap (a library for Packet CAPturing) callback function which is called for every incoming (tcp) packet. This function has a database in form of a global linked list of structs to manage connenctions (adding new, removing old). If a connection is not found in this database it looks up the user ID for that connection and adds it to the list. Then it gets the size of the packet and adds it to the value of the traffic for that user ID, which is stored in a similar linked list of user IDs. At the end it writes out all the information at a given interval to a file in /var/log/traffic.

RateXCalc is a simple tool for audio/video streams and media size/length cross calculation.
With RateXCalc you can:
- Evaluate the maximum video rate for a perfect fit in different media
- Calculate the final production size for a given movie length and a/v rates
- Jog the video rate with a slider and see the subsequent fit for a given media type
Examples:
1. I have to know the best audio or video bitrate for a given movie (length). Ill lock the audio or the video variable and let the program calculates these values selecting the amount of CD or other media that I intend to use.
2. I want to lock the media variable: changing the other variables the program will let me know how many CD I must use and the percentile fit of the CD or the last one (if more than one).
So I can define the time, choose a preferred audio bitrate and play with the video bitrate slider to get an optimized distribution of data on the x CDs.

Scrabble Blast Solver 0.1 offers you a professional and easy-to-use software which is an effective way to find and display words and their score for the popular online Scrabble Blast game. This product will be your good choice.

Sendmail delivery stats is a Perl script to analyze Sendmail log files and produce mean delivery times. It dumps all data in CSV format.
Recently I had to bear with mail server analyze, serving traffic on level +10k messages a day. And there were some degradation of services felt by users, but there was no stright pattern what mails are delivered with bigger latency. Since this was Sendmail powered site I wrote simple tool in Perl to help with analysis.
I hope it is simple to use. What it does ? It collects all log entries, which are related to successful mail delivery. Groups it by domain and calculates average delivery time (time to leave queue - I is rather impossible to estimate time spend in others servers queues). Most useful (for me) is -a option, which makes all output in CSV format, for easy use in further analysis.
It was tested on logs from Sendmail 8.13.x and I belive it calculates proper values.
Enhancements:
- The HTML output format was added, with possible template use.
- Output is now sorted.
- Minor bugfixes and code cleanup were done.

Cournol is a GTK+ based application for analyzing an absolute supply monopoly. The project calculates the maxiumum profit of a supply monopoly and draws the respective graphs.

Cournol contains the library nxpgtkdatabox which is an implementation of NxpRuler (by Gustavo J. A. M. Carneiro, contained in gnumexp 0.11) in the GtkDatabox library (by Dr. Roland Bock). The file "patches/gtkdatabox.diff" of the source tar.gz contains the changes of GtkDatabox.

The NxpRuler library was not modified. GtkDatabox and NxpRuler are released under the LGPL (see COPYING.LIB). Thus, nxpgtkdatabox, also complies with the terms of the LGPL. However, the actual program "cournol" is released under the terms of the GPL.