XESS is a spreadsheet for UNIX, Linux, OpenVMS, and Windows NT which supports user-configurable 3-D workbooks with up to 10 million rows, enhanced display and print formatting, international locales (including multi-byte languages), full Y2K compliance, Web enablement, and a high level of compatibility with the Excel and Lotus spreadsheet products. It includes filters for Excel 97, Excel 2000, and Lotus spreadsheets.
X-Tract is an XML Script processor. XML Script is a fully XML compliant language, specifically designed for handling XML data. XML Script is more powerful than XSL, and can perform many XSL functions more efficiently. X-Tract can be used on the command line, or can be run from a web server to handle CGI queries.
x10mp3 is a plugin for XMMS to control it using X10's Mp3Remote, which comes with Mp3Anywhere, Mp3Anywhere 2000, or DVDAnywhere. It has all the functionality of X10's BOOM2000 software for Windows, plus other handy features like muting, skipping around inside tracks, and balance control.