The xattr command lists, writes (sets), prints (displays), and deletes the extended attributes of file system objects. An extended attribute is a name:data (key:value) pairing arbitrarily associated with a file system object (e.g. file, directory, or symbolic link). The name of an extended attribute may be any null-terminated UTF-8 string. The data associated with it may be either textual or binary. This implementation of the xattr command is designed to be backwards-compatible with the Python script that shipped as /usr/bin/xattr in Mac OS 10.5.0 (Leopard).
xfigchart.pl is a quick and easy way to create bar charts. It uses a commandline interface and takes data values as a table from stdin and writes an XFig file to stdout. Postprocessing of the bar charts is done manually using the free vector drawing tool XFig, with which it is possible to create very complex diagrams mixed with other graphics components in a short time and to use a variety of export filters (PostScript, LaTeX, PNG, etc.).
The xfilesel program is used to copy the X selection into a file and to copy a file contents to the X selection. It acts as a bridge between applications that support selections and console applications (for example with default Midnight Commander clipboard file ~/.cedit/cooledit.clip).