Kracht provides helpful and convenient functionalities that can help you develop more comfortably in your Guile Scheme project. You can see it as a batteries-included addition to the (already great) standard library, complementing it, and helping developers write cleaner code.

This package provides a simple SVG-based picture language for Guile. The picture values can directly be displayed in Geiser.

guile-dbi is a library for Guile that provides a convenient interface to SQL databases. This package implements the interface for PostgreSQL.

This library implements a JavaScript Object Notation (JSON) parser and printer. It also supports parsing JSON objects that may be bigger than memory with a streaming API.

This package provides an implementation of AA trees, a self-balancing binary tree data structure, for Guile. It ensure O(log n) worst case performance for core operations. The module provides non-mutating insert, delete, and search operations, with support for convenient nested tree operations.

This project provides Guile bindings to the DRMAA library version 1. DRMAA is a resource management library implemented by HPC cluster schedulers.

This package provides a Guile programming interface to the ZeroMQ messaging library.

guile-jwt is a JSON Web Token module for Guile. JSON Web Tokens are an open, industry standard (RFC 7519) method for representing claims securely between two parties. guile-jwt allows you to decode, verify and generate JWT. Supported algorithms: HS256, HS384, HS512.

Guile-JPEG is a Scheme library to parse JPEG image files and to perform geometrical transforms on JPEG images.

This package provides bindings for GNU Parted library, a C library allowing disk partition tables creation and manipulation. The bindings are written in pure Scheme by using Guile's foreign function interface.

guile-commonmark is a library for parsing CommonMark, a fully specified variant of Markdown. The library is written in Guile Scheme and is designed to transform a CommonMark document to SXML. guile-commonmark tries to closely follow the CommonMark spec, the main difference is no support for parsing block and inline level HTML.

GuileScript is a toy compiler that aims to compile Guile to JavaScript. It currently does not do much, but it might in the future.

Lokke intends to provide a full dialect of Clojure for Guile. It also consists of a set of Guile modules providing some of Clojure's functionality in two different guises.

This package provides an implementation of SRFI 128 for Guile. SRFI 128 defines comparators, which bundles a test type predicate, an equality predicate, an ordering predicate and a hash function into a single Scheme object. This can be used in the implementation of data structures. This package re-uses the SRFI sample implementation.

Utility procedures provided by this SRFI in addition to the R6RS API may be categorized as follows:

• Constructors: alist->eq-hashtable, alist->eqv-hashtable, alist->hashtable

• Access and mutation: hashtable-lookup, hashtable-intern!

• Copying: hashtable-empty-copy

• Key/value collections: hashtable-values, hashtable-key-list, hashtable-value-list, hashtable-entry-lists

• Iteration: hashtable-walk, hashtable-update-all!, hashtable-prune!, hashtable-merge!, hashtable-sum, hashtable-map->lset, hashtable-find

• Miscellaneous: hashtable-empty?, hashtable-pop!, hashtable-inc!, hashtable-dec!

This package provides an implementation of ActivityStreams and ActivityPub in Guile. It includes a full (currently demo) web server.

Topological sorting is an algorithm that takes a graph consisting of nodes and other nodes that depend on them, forming a partial order, and returns a list representing a total ordering of the graph. If the graph is cyclic, the topological sort will fail. The procedure topological-sort returns three values. If sorting succeeds, the first value contains the result and the second and third are #false. If sorting fails, the result is #false and the second and third value may provide additional information about the error.

f.scm is a library intended to facilitate working with files and directories (the file system in general). It was initially inspired by the f library for Emacs.

This package provides a simple Guile interface to .env (or dotenv) files. It implements parsing of files and setting environment variables from them.

Guile-redis provides a Scheme interface to the Redis key-value cache and store.

guile-dns is a DNS library written in pure Guile Scheme.

Guile-Lens is a library implementing lenses in Guile. The library is currently a re-implementation of the lentes library for Clojure. Lenses provide composable procedures, which can be used to focus, apply functions over, or update a value in arbitrary data structures.

GNU Guile QR code generator that can create QR codes from text and binary data. The resulting QR codes can be rendered to ASCII art strings or to PNG images (using Guile-PNG API.)

guile-tap is a library for GNU Guile that implements a framework for specifying test cases that emit output that adheres to the Test Anything Protocol (TAP). It comes with an experimental harness (tap-harness).