PyCifRW provides support for reading and writing CIF (Crystallographic Information File) format files. CIF is the standard format for crystallographic data exchange endorsed by the International Union of Crystallography.

PyStoG is a Python package for converting between different total scattering functions used in crystalline and amorphous materials research. It handles reciprocal-space structure factors and real-space pair distribution functions, performing Fourier transforms between them and applying filters to remove spurious artifacts in the data.

SeeK-path is a Python module to obtain band paths in the Brillouin zone of crystal structures. It automatically detects Bravais lattice types and generates k-point labels and band paths following crystallographic conventions.

Npiet is an interpreter for the Piet programming language. Instead of text, Piet programs are pictures. Commands are determined based on changes in color.

This package includes:

1. npiet, a Piet interpreter with debugging capabilities

2. npiet-foogol, a program that builds a Piet program from Foogol, an Algol-like language

3. npietedit, an editor for Piet programs.

This package provides a compiler and assembler that target the Piet graphical programming language.

piet-assembler converts Piet assembler instructions (e.g., push, add, switch, outn) and directives into an executable netpbm image of the corresponding Piet program.

piet-compiler compiles a C-like high-level language into assembly source understood by piet-assembler. It supports common arithmetic and boolean logic operators (though not bitwise manipulation), flow control (if, for, while), recursive functions, in-line assembler, and input/output intrinsics. The only supported data type is the integer.

The language is documented only by the compiler's Perl source code and the included samples.

pkgconf is a program which helps to configure compiler and linker flags for development libraries. It is similar to pkg-config from freedesktop.org. libpkgconf is a library which provides access to most of pkgconf's functionality, to allow other tooling such as compilers and IDEs to discover and use libraries configured by pkgconf.

pkg-config is a helper tool used when compiling applications and libraries. It helps you insert the correct compiler options on the command line so an application can use gcc -o test test.c `pkg-config --libs --cflags glib-2.0` for instance, rather than hard-coding values on where to find glib (or other libraries). It is language-agnostic, so it can be used for defining the location of documentation tools, for instance.

pkgconf is a program which helps to configure compiler and linker flags for development libraries. It is similar to pkg-config from freedesktop.org. libpkgconf is a library which provides access to most of pkgconf's functionality, to allow other tooling such as compilers and IDEs to discover and use libraries configured by pkgconf.

Plan 9 from User Space (aka plan9port) is a port of many Plan 9 programs from their native Plan 9 environment to Unix-like operating systems.

drawterm is a client for connecting venerable systems to Plan 9 systems. It behaves like a Plan 9 kernel and will attempt to reconstruct a Plan 9 terminal-like experience from a non-Plan 9 system.

drawterm is a client for connecting venerable systems to Plan 9 systems. It behaves like a Plan 9 kernel and will attempt to reconstruct a Plan 9 terminal-like experience from a non-Plan 9 system.

Diod is a multi-threaded, user space file server that speaks 9P2000.L protocol.

9pfs mounts a file system using the 9P protocol. It is a replacement for 9pfuse from plan9port.

Playwright is a framework for browser automation and end-to-end testing. This package provides playwright-core, the library without bundled browsers.

Important: This package only supports Chromium-based browsers. Firefox and WebKit are not supported because Playwright requires custom-patched versions of those browsers that are not packaged for Guix.

To use Playwright with the system Chromium, either:

1. Set the environment variable PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH to the Chromium binary path, or

2. Use the executablePath option in your Playwright code:

   const browser = await chromium.launch({
     executablePath: '/run/current-system/profile/bin/chromium'
   });

   For the command line variant $codeplaywright-core, set the environment variable $envPWTEST_CLI_EXECUTABLE_PATH to the Chromium binary path.

Guile-Plotutils is a Guile binding to the venerable GNU Plotutils plotting and graphing library. If you want to make graphs that look like you went to university in the 1990s, this is the library for you.

Matplot++ is a graphics library for data visualization that provides interactive plotting, means for exporting plots in high-quality formats for scientific publications, a compact syntax consistent with similar libraries, dozens of plot categories with specialized algorithms, multiple coding styles, and supports generic backends.

GNU Plotutils is a package for plotting and working with 2D graphics. It includes the C library libplot and the C++ libplotter library for exporting 2D vector graphics in many file formats. It also has support for 2D vector graphics animations. The package also contains command-line programs for plotting scientific data.

UnicodePlot provides the feature to make charts with Unicode characters. Supported charts are: barplot, boxplot, densityplot, histogram, lineplot, and scatterplot.

Ploticus is a non-interactive software package for producing plots, charts, and graphics from data. Ploticus is good for automated or just-in-time graph generation, handles date and time data nicely, and has basic statistical capabilities. It allows significant user control over colors, styles, options and details.

PLplot is a software package for creating scientific plots which core library can be used to create standard x-y plots, semi-log plots, log-log plots, contour plots, 3D surface plots, mesh plots, bar charts and pie charts. Multiple graphs (of the same or different sizes) may be placed on a single page, and multiple pages are allowed for those device formats that support them.

PLplot has support for plot symbols and text specified by the user in the UTF-8 encoding of Unicode. This means for our many Unicode-aware devices that plot symbols and text are only limited by the collection of glyphs normally available via installed system fonts. Furthermore, a large subset of our Unicode-aware devices also support complex text layout (CTL) languages such as Arabic, Hebrew, and Indic and Indic-derived CTL scripts such as Devanagari, Thai, Lao, and Tibetan. Thus, for these PLplot devices essentially any language that is supported by Unicode and installed system fonts can be used to label plots.

Asymptote is a powerful descriptive vector graphics language for technical drawing, inspired by MetaPost but with an improved C++-like syntax. Asymptote provides for figures the same high-quality level of typesetting that LaTeX does for scientific text.

Guile-Charting is a Guile Scheme library to create bar charts and graphs using the Cairo drawing library.

YouPlot is a command line tool that draws plots on the terminal, powered by UnicodePlot gem. It provides commands youplot and uplot (shorthand) are provided, and supports chart types of barplot, histogram, lineplot, scatter, density, boxplot, and count.

Guile-Charting is a Guile Scheme library to create bar charts and graphs using the Cairo drawing library.