guile-kolam is a GraphQL implementation for Scheme. kolam features a parser to parse and serialize GraphQL documents, a type system to create GraphQL schemas, an execution engine to execute GraphQL queries, and a HTTP handler to implement a HTTP GraphQL endpoint.

This is Emacs with a few settings that make working with Guile easier for people new to Emacs. Features include: CUA mode, Geiser, tool bar icons to evaluate Guile buffers, support for Guile's very own picture language, code completion, a simple mode line, etc.

guile-png is a GNU Guile library for working with the PNG format. This library provides API for reading and writing PNG data, as well as some graphic primitives and basic image processing filters.

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

Additionally, this package provides a dotenv command, exposes part of the guile-dotenv Guile API as command lines invocations.

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-SMC is a state machine compiler that allows users to describe finite state machines (FSMs) in Scheme in terms of transition tables. It is capable to generate such transition tables from a PlantUML state diagrams.

A transition table can be verified and checked for dead-ends and infinite loops. Also Guile-SMC FSMs gather statistics when they run.

Guile-SMC comes with a Scheme program called smc -- a state machine compiler itself. It produces a Scheme code for an FSM from the PlantUML format. This tool is meant to be called on a PlantUML file when a program with a FSM is being built (for example, from a Makefile.)

guile-ncurses provides Guile language bindings for the ncurses library.

Guile-Reader is a simple framework for building readers for GNU Guile.

The idea is to make it easy to build procedures that extend Guile’s read procedure. Readers supporting various syntax variants can easily be written, possibly by re-using existing “token readers” of a standard Scheme readers. For example, it is used to implement Skribilo’s R5RS-derived document syntax.

Guile-Reader’s approach is similar to Common Lisp’s “read table”, but hopefully more powerful and flexible (for instance, one may instantiate as many readers as needed).

This package provides a functional parser combinator library that supports backtracking and a small logical framework. The idea is to build up chunks that are memoized and there is no clear scanner/parser separation, chunks can be expressions as well as simple tokens.

Guile-colorized provides you with a colorized REPL for GNU Guile.

This package provides an implementation of SRFI 158 for Guile. SRFI 158 defines utility procedures that create, transform, and consume generators. It also defines procedures that return accumulators. It is implemented by wrapping the sample implementation in a thin Guile compatibility layer.

MiniKanren is a relational programming extension to the Scheme programming Language, written as a smaller version of Kanren suitable for pedagogical purposes. It is featured in the book, The Reasoned Schemer, written by Dan Friedman, William Byrd, and Oleg Kiselyov.

This is Ian Price's r6rs packaged version of miniKanren, which deviates slightly from miniKanren mainline.

See http://minikanren.org/ for more on miniKanren generally.

Guile-GI is a library for Guile that allows using GObject-based libraries, such as GTK+3. Its README comes with the disclaimer: This is pre-alpha code.

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

This Guile library provides tools for reading, comparing, and writing Semantic Versions. It also includes ranges in the style of the Node Package Manager (NPM).

This package provides bindings for Avahi. It allows programmers to use functionalities of the Avahi client library from Guile Scheme programs. Avahi itself is an implementation of multicast DNS (mDNS) and DNS Service Discovery (DNS-SD).

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

guile-email is a collection of email utilities implemented in pure guile. It supports parsing MIME (Multipurpose Internet Mail Extensions) compliant email messages and reading emails from the mbox format.

This package provides bindings to the GitLab Community Edition REST API as well as the gitlab-cli command line tool for interacting with a GitLab instance.

guile-ini is a GNU Guile library for working with the INI format. This library provides API for reading and writing INI data.

The (hashing …) modules implement cryptographic hash functions in pure R6RS Scheme: CRC, HMAC, MD5, SHA-1, and SHA-2 (SHA-256, SHA-512).

This package provides a Guile library to communicate with a Debbugs bug tracker's SOAP service, such as https://bugs.gnu.org.

Schmutz is a header-only library to declare Scheme bindings for C++ code using a simple embedded DSL. Think of it as Boost.Python or LuaBind but for Scheme.

squee is a Guile library for connecting to PostgreSQL databases using Guile's foreign function interface.