xslide is a major mode for (X)Emacs for editing XSL Stylesheets. Its features include an XSL customization group for setting some variables; an initial stylesheet which is inserted into empty XSL buffers; a "template" menu for jumping to template rules, named templates, key declarations, and attribute-set declarations in the buffer; an "xsl-process" function that runs an XSL processor and collects the output; syntax highlighting; an "xsl-complete" function for inserting element and attribute names; an "xsl-insert-tag" function for inserting matching start- and end-tags; automatic completion of end-tags; automatic indenting of elements with user-definable indentation step; and a comprehensive abbreviations table.
xtalfind checks whether any XTAL is suitable for a HAM radio circuit (TX, RX). Given a base XTAL frequency, it shows you all possible uses within HAM bands. It features CW TX and direct conversion RX. It supports 455kHz, 10.7MHz, and custom IF value receivers, DRM, and SDRadio applications.
Xws is a text mode multi-player crossword and chat server. It presents the same puzzle to everyone, allowing people the option to try and/or discuss solutions. Play may be friendly collaboration or fierce competition, depending on the players' dispositions. Xws supports hundreds of puzzles in the popular Across Lite file format. Copyright issues prevent the distribution from including any puzzles, but several archives and resources are listed in the README.
xylib is a portable C++ library for reading files that contain x-y data from powder diffraction, spectroscopy, or other experimental methods. Supported formats include plain text (CSV or TSV), Crystallographic Information File for Powder Diffraction (pdCIF), Siemens/Bruker UXD, Siemens/Bruker RAW v1/2/3, Philips UDF, Philips RD (raw scan) V3, Rigaku DAT, Sietronics Sieray CPI, DBWS/DMPLOT data file, Canberra MCA, XFIT/Koalariet XDD, RIET7/LHPM/CSRIET/ILL_D1A5/PSI_DMC DAT, Vamas ISO14976, and Princeton Instruments WinSpec SPE.
y-notes is a set of lightweight applets and CGI scripts which enables a webmaster to specify points where the website's visitors may leave 'sticky notes'. The notes are kept on the server so that users can retrieve them at a later time and use them as a navigation aid. y-notes are particularly useful in large sites such as tutorials and reference manuals. They can also be used in web pages as a fairly uncomplicated way of gathering user feedback which requires no registration, logins, or passwords.