xJigsaw combines xjig with a simple GUI which allows easy creation of jigsaw puzzles. There is no need to install xJigsaw, and it does not need xjig. Everything is in a single file. Just download it, unzip it, and run it. It works with png, gif, jpg, tif, and bmp images, and offers image previews. The user can fix the rotation angle of puzzle pieces when dragging and can choose different shapes for the puzzle pieces. Puzzle pieces snap to 90 degree angles. The user can swap mouse buttons, set the width of the puzzle, and set the number of puzzle pieces.
xMarkup is a command line and GUI utility for multipurpose processing of a set of text files. It can be used to generate or edit the navigational cross-references within a set of HTML documents, analyze and convert the structure or content of SGML, XML, HTML, or text documents, split or merge text files with specified rules, analyze and extract data, generate scripts, and more. xMarkup supports a built-in procedural language which may be used to describe rules of the processing. This language is a simple dialect of the Icon programming language.
xlax is an X11 input multiplexer: it sends your keyboard input from the xlax window to a group of windows simultaneously. The tool is designed for system administrators who typically have to do the same thing on several machines (or in several different directories). Windows can be added or deleted interactively, or temporarily disconnected and reconnected. xlax allows you to assign a custom string to each window (e.g. a hostname) that can be sent with a button click. An included script handles starting up and arranging windows, and allows you to set up commonly used window groupings in a config file.
xlife is a laboratory for experimenting with cellular automata. It supports loadable rulesets and palettes, different topologies, and up to 256-state cellular automata. It has rules and patterns for Life, Brian's Brain, Perrier's Loops, Langton's Ants and Loops, Wireworld, E.F. Codd's 1975 UCC automaton, some Prisoner's Dilemma games, and many others. It is very fast for step-by-step mode, bounded grid, and chaotic patterns. It has several unique features: a historical mode, a pseudocolor mode, and n-state statistics. It has been developed since 1989. The modern version of Xlife began its history in 2011.
xmdb is a collection of programs that calculate and display Mandelbrot sets using X11. This package includes sources for mcalc, xmdisp, and mxwd. mcalc does the calculations and writes a datafile. xmdisp reads the datafile and produces an X11 display that contains a fractal picture. mxwd reads the datafile and writes an X Window dump (xwd) format file which can be read by xwud and xpr.