mptc is a Perl script to help you work out whether you're on the cheapest mobile phone network/tariff for your phoning habits. You feed it an itemised phone bill and tariff pricing information, and it will tell you how much that bill would have cost on different tariffs. So far it only supports UK network pricing systems, but could easily be extended and applied in other countries.
smtm (Show Me The Money) is a Perl/Tk ticker, profit/loss calculator, and chart tool. It can display up to ten fields per share, among them company name, price, absolute and relative price changes as well as net wealth change (if the number of shares held is supplied). Other assets such as options, mutual funds, currencies are also supported. Foreign stocks are treated via cross-currency pairs that translate into domestic units. Charts can be launched with one click, and all the charts available at Yahoo!, including all of the advanced moving average and technical analysis features, can be displayed. Stocks can be added and deleted, and the selection can be stored. smtm has been used with US, Canadian, European, Asian, Australian/New Zealand, and South American stocks. Firewalls are fully supported, including user/password support.
PLOTICUS is a command line utility for creating bar, line, pie, boxplot, scatterplot, sweep, heatmap, vector, timeline, Venn diagrams, and other types of charts and plots. ploticus is good for automated or just-in-time graph generation. It handles date, time, and categorical data nicely, and has some basic statistical capabilities. It can output to GIF, PNG, SVG, SWF, JPEG, PostScript, EPS, and X11. You can use convenient preset options or create complex scripts with rich and detailed color and style operations.
Sgraph is a utility to create graphs from data supplied by the user. It creates standard stock charts, using open/min/max/close and volume data. Another goal is to create a set of functions that can serve as a static library, to interface with your stock data manipulation routines.
xlHtml converts an Excel spreadsheet file (.xls) into highly-optimized HTML. It includes scripts to allow it to be used as a Netscape or mutt plugin and as a xls handler for Apache. The program currently supports string, blank, boolean, error, integer, floating point, hyperlinks, and formula cells. It can also output in XML, tab delimited, or comma separated values (CSV).