Open Source Haskell Software - Page 5

Functional Networked Integrated Environment (FUNNIE) is a networked CSCW programming environment specifically tuned to the needs of students and instructors, based on a subset of Haskell.

Fay is a compiler for a proper subset of Haskell that type-checks using GHC and compiles to JavaScript. It supports pure functional programming, a Fay-specific monad, FFI, optional tail-call optimization, and integration with Cabal packages. GHC-compatible type checking, ensuring correctness. Lazy, pure functional semantics with a distinct Fay monad. Foreign Function Interface (FFI) to integrate native JS code. Compatible with standard Haskell packaging tools like Cabal.

The default text editor for Fid.

The Fluxion framework is a prototype data integration system using Semantic Web technologies.

Foo (abbreviation from football) is a playing machine of Paper Soccer, a pencil and paper game for two players, described in WIKIPEDIA. Written in Haskell, contains also simply interface using HOpenGL library. Provides bunch of playing algorithms.

Functional Reactive VR is a library for developing dynamic, interactive Virtual Environments. The FRVR framework provides new and powerful tools for implementing the dynamics and interaction of Interactive Experiences.

A collection of general or specific tools created in the process of creating other, larger programs.

This repository is a tutorial collection showcasing functional programming concepts across multiple languages (Haskell, OCaml, Scala, Scheme, Clojure, Python). It provides reusable code snippets, examples, and case studies to illustrate FP ideas in a comparative manner. The purpose of this tutorial is to illustrate functional programming concepts in many languages by providing reusable and useful snippets of code, examples, case studies and applications. The project’s web site was updated and improved with a table of contents on side-bar. In addition, the new layout makes reading easier to read and browse the content. Those pages in the theme are in the gh-pages branch which can easy be downloaded for offline usage.

Fusion is a powerful high level programming language that merges several feature from Ruby, Python, Java, C++, Visual Basic, etc, in a only language. It's implemented by means of a compiler written in Haskell that generates Ruby code.

GHC (Glasgow Haskell Compiler) is the leading open-source compiler and interactive environment for the Haskell programming language, supporting the Haskell 2010 standard plus numerous language extensions. It compiles to native machine code (via LLVM or C), and includes the interactive GHCi REPL. For full information on building GHC, see the GHC Building Guide. Here follows a summary - if you get into trouble, the Building Guide has all the answers. For building library documentation, you'll need Haddock. To build the compiler documentation, you need Sphinx and Xelatex (only for PDF output).

GHCJS is a Haskell-to-JavaScript compiler that reuses GHC’s front end to compile Haskell source into JavaScript for execution in browsers and Node.js. It aims to preserve Haskell’s semantics—including laziness and rich types—by shipping a small runtime and shims for core libraries. Developers write normal Haskell, use Cabal/Stack to build, then bundle the generated JavaScript alongside required support code. Interoperability with the JavaScript world is provided through a foreign-function interface, allowing Haskell code to call browser APIs or Node modules and to be called back from JS. The ecosystem includes packages tailored to GHCJS (for example DOM bindings and FRP libraries), enabling full single-page apps written in Haskell. Because it mirrors GHC closely, many pure Haskell libraries “just work,” making it practical to share code between server and client.

ghcid is a minimalist development tool for Haskell that runs GHCi as a daemon, watches source files for changes, reloads automatically, and shows compile errors instantly—providing a tight edit-feedback loop. In general, to use ghcid, you first need to get ghci working well for you. In particular, craft a command line or .ghci file such that when you start ghci it has loaded all the files you care about (check :show modules). If you want to use --test check that whatever expression you want to use works in that ghci session. Getting ghci started properly is one of the hardest things of using ghcid, and while ghcid has a lot of defaults for common cases, it doesn't always work out of the box. Expressions that read from standard input are likely to hang, given that Ghcid already uses the standard input to interact with Ghci.

Gitit is a wiki application written in Haskell that uses Happstack for serving and Pandoc for markup conversion. Wiki content and attachments are stored in Git, Darcs, or Mercurial repositories, allowing versioning via VCS or web editing. To run gitit, you'll need git in your system path. (Or darcs or hg, if you're using darcs or mercurial to store the wiki data.) Gitit assumes that the page files (stored in the git repository) are encoded as UTF-8. Even page names may be UTF-8 if the file system supports this. So you should make sure that you are using a UTF-8 locale when running gitit. (To check this, type locale.) The metadata block consists of a list of key-value pairs, each on a separate line. If needed, the value can be continued on one or more additional line, which must begin with a space.

The Grammatical Framework (GF) is a grammar formalism based on type theory. It consists of a special-purpose programming language, a compiler of the language, and a generic grammar processor.

Greenclip is a lightweight clipboard manager designed for Wayland and X11 environments on Linux. It integrates seamlessly with Rofi or other application launchers, allowing users to access and paste clipboard history entries quickly. Greenclip stores clipboard content persistently and can be configured to manage how many entries are saved, offering a minimalistic yet effective solution for power users and Linux enthusiasts.

A wrapper around Gtk+ 2.x for the functional language Haskell featuring full memory management, Unicode awareness and of course the new features of Gtk2.

Common Haskell code for other semantic.org projects, and other useful things.

HLearn is a Haskell-based machine learning library focused on composability, algebraic structure, and performance. It provides a functional approach to building machine learning algorithms by leveraging algebraic properties such as monoids and groups. This allows for parallel, incremental, and distributed computation in a mathematically consistent way. HLearn aims to provide implementations of common algorithms like k-means, naive Bayes, and others while maintaining the expressiveness and safety of the Haskell language.

HLint is a linter for Haskell that suggests stylistic improvements and potential simplifications in Haskell code. It parses Haskell source files and provides hints to refactor code for better readability, maintainability, or performance. HLint is highly configurable and supports custom rules, integrations with CI tools, and editor plugins. It is widely used in the Haskell ecosystem for maintaining consistent code standards.

A Haskell to Objective-C binding. Allows access to Apple's Cocoa API from the non-strict functional programming language Haskell.

HSDL is a Haskell binding to the well known Simple Directmedia Layer (SDL) library including bindings to SDL_gfx, SDL_image and SDL_ttf.

HScheme is a Scheme interpreter written in Haskell, available as both interactive interpreter and extension library for other Haskell projects. Think 'Guile for Haskell'.

HaLVM is a Haskell-based unikernel system that lets you write entire virtual machines in Haskell and run them directly on a hypervisor, traditionally Xen. Instead of deploying a full operating system, you compile a Haskell program into a tiny image that boots as its own VM, which reduces the attack surface and startup time. The project adapts GHC and the Haskell runtime to a minimal environment, providing the I/O, networking, and memory facilities necessary for standalone services. Its design encourages highly isolated services—each VM does one job—making it attractive for security-sensitive components and research on microservice-style architectures. Developers get to keep Haskell’s strong typing, concurrency abstractions, and functional style while targeting bare virtual hardware. Although device support is intentionally narrow compared to general-purpose OSes, the trade-off is predictability and very small, auditable deployments.

Hakyll is a Haskell library for building static websites. It uses a highly configurable domain-specific language (DSL) embedded in Haskell, enabling users to define content compilation pipelines in code. It’s ideal for blogs and small-to-medium websites, with support for Markdown, Pandoc, and syntax highlighting. Hakyll is a static site generator library in Haskell. More information (including a tutorial) can be found on the Hakyll homepage. You can install this library using cabal. If Stack fails, please see which Stackage snapshots contain Hakyll and specify one explicitly.

A small command-line calculator, written in Haskell, that takes input like "14+(12+24)/(8.5-2.5)" and prints out the result. It's nothing special really, just a little project I did to learn Haskell.