ZSI is a Python package that provides an implementation of SOAP messaging, as described in The SOAP 1.1 Specification. In particular, ZSI parses and generates SOAP messages, and converts between native Python datatypes and SOAP syntax. It can also be used to build applications using SOAP Messages with Attachments. ZSI is ``transport neutral'', and provides only a simple I/O and dispatch framework; a more complete solution is the responsibility of the application using ZSI.

Racket (previously PLT Scheme) is an innovative programming language that builds on a rich academic and practical tradition.

In Taiwan, the customer usually get the gross price. But on the invoice we have to write the net price with tax. This program helps you to reverse calculate the gross price to net price and tax. And automatically adjust the net price if needed.

Isoqlog is an MTA log analysis program written in C. It designed to scan qmail, postfix, sendmail logfile and produce usage statistics in HTML format for viewing through a browser. It produces Top domains output according to Sender, Receiver, Total mails and bytes; it keeps your main domain mail statistics with regard to Days Top Domain, Top Users values for per day, per month and years.