Free graphical representation software for windows

Graphical xls2csv 1 is an effective tool that allows you to transform your Excel worksheets into CSV files.

CurTiPot Acid-Base pH and Titration - A pH Calculator, a Virtual Titrator, a Real Titration Data Analyzer, a Distribution Diagram Generator - thats CurTiPot, the all-in-one freeware to learn, teach and work with chemical equilibrium of acids, bases, salts and buffers at home, classroom, interactive "dry lab", routine or research laboratory. Features of this powerful suite of MS Excel spreadsheets embrace:

* pH calculation of any aqueous solution of strong and weak acids, bases, salts, buffers and mixtures of up to 7 polyprotic systems (>40 species), with activity coefficient estimation;

* Simulation and overlay of acid-base titration curves of any complexity, with or without random errors in pH and/or volume. Valuable for teaching, generation of unlimited titration exercises and evaluation of the feasibility and accuracy of new titrations.

* Analysis of pH vs. volume data from simulated and real potentiometric titration curves by two methods: i) graphical representation of curves, assisted by cubic splines interpolation and smoothing of derivative curves, for accurate evaluation of inflections (end-points); ii) determination of concentrations and refinement of pKa values by multiple nonlinear regression (based on the Solver supplement of Excel), essential for difficult titrations with undefined inflections, e.g., acid rain.

* Generation of protonation curves and distribution diagrams of equilibrium species of acids and bases at equilibrium as a function of pH or of added volume of titrant.

* Expandable database with pKa values of 250 acids and bases.

Simply unzip the curtipot_.xls file, open it with Microsoft Excel, habilitate macros and start learning, working and teaching. No install/uninstall required, all macros are removed by closing file. The software is completely free for educational and non-commercial not-for-profit use.

Regression data analysis including activity calculation; Vista / Excel 2007 compatible; quick pKa loading from database

pH sensor calibration refinement added; Excel 2007 compatible; quick pKa loading; log(alpha) on titration curves

Real-time monitoring and statistics for Apache HTTP server.
HSLAB HTTP Monitor is a complete solution for visualization of the connections and performance data for Apache servers Web in real time.
The information is collects remotely, the server and the HTTP Monitor can works in different places without any restrictions.
This software connects to the Web server and receives from it the information about connections (sessions) by the current moment.
Using HSLAB HTTP Monitor you can see all users connections to each virtual server both as a queries tree and as the table.
Review of extended statistics of requested documents in graphical representation and as a tree of documents also is available.
You can view of documents allocation by pages, images, files and other documents.
HSLAB HTTP Monitor uses an option of Apache web server on display its connections statistics.
The statistical information turns out from the server using HTTP requests and processed by the program for visualization.
Connections statistics:
? Servers connections graph;
? Servers connections tree with all virtual servers on this host;
? All opened documents / files for each virtual host.
Besides the statistical information concerning directly the server and operational system is displayed:
? The server version and operation system type;
? Time of last restart of the server;
? Server uptime;
? Number of requests for this time and full traffic;
? Number of requests per second, volume of the information per second and average volume of the request;
? System processor performance counters.

System requirements:
- 2 Mbytes for the program and minimum of 3 Mbytes for installation
- Screen resolution 1024 x 768 x 8-bit color, 1024 x 768 x 16-bit color recommended.