PubTal uses the ZPT language from ZOPE and input plugins to generate a web site, maintaining content separate from presentation.

xtail watches the growth of files. It's like running a "tail -f" on a bunch of files at once. It notices if a file is truncated and starts from the beginning. You can specify both filenames and directories on the command line. If you specify a directory, it watches all the files in that directory. It will notice when new files are created (and start watching them) or when old files are deleted (and stop watching them).

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Xajax is an open source PHP class library that allows you to easily create powerful, web-based, Ajax applications using HTML, CSS, JavaScript, and PHP. Applications developed with xajax can asynchronously call server-side PHP functions and update content without reloading the page.

Tools to check whether you can receive Source Specific Multicast (SSM) or Any Source Multicast (ASM) via either IPv4 or IPv6

XPPAUT is a tool for solving * differential equations, * difference equations, * delay equations, * functional equations, * boundary value problems, and * stochastic equations.