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__NOTOC__
 
 
[[Category:Libraries]] [[Category:Tools]]
 
[[Category:Libraries]] [[Category:Tools]]
Applications, libraries and tools written in Haskell.
 
   
Developers: if you release any Haskell code, please document it for the
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The number of Haskell packages is growing rapidly. The section 'Haskell library collections' gives an ordering of all these packages by relative importance. In the section 'Haskell applications and libraries' an ordering by category is given. Finally some guidelines for developers of new packages are presented.
community, by adding it to the appropriate category on this page.
 
   
== Haskell libraries ==
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== Haskell library collections ==
   
The first places to look for data types or functions are:
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=== Haskell Prelude ===
* [http://haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html The Haskell 98 Prelude]
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The most important Haskell library is called the [http://www.haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html Prelude]. It is implicitly imported by default, and includes the most commonly used functions. Make sure you know what they do and how to use them effectively.
* [[Haskell 98 language and library specification]]
 
* [http://www.haskell.org/ghc/docs/latest/html/libraries/index.html The Haskell Hierarchical Libraries] bundled with Haskell implementations
 
* [http://haskell.org/hoogle Hoogle] - the Haskell API Search Engine, indexing the above libraries
 
* [http://hackage.haskell.org/packages/archive/pkg-list.html The Hackage database] - a collection of released Haskell packages
 
See also [[Hackage]] and [[Cabal/How to install a Cabal package | how to install a Cabal package]].
 
   
== HackageDB ==
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=== The Haskell 2010 libraries ===
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The Haskell 2010 [[Language and library specification]] defines a set of [http://www.haskell.org/onlinereport/haskell2010/haskellpa2.html libraries] with basic functionality which all Haskell implementations should support, including the Prelude. Changes to these libraries are handled by the [http://hackage.haskell.org/trac/haskell-prime/ Haskell'] process.
   
[http://hackage.haskell.org/packages/archive/pkg-list.html HackageDB] is
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Haskell modules that almost everybody uses are in this group, for example:
the new central database for 3rd party Haskell packages. Look here for
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[http://www.haskell.org/onlinereport/haskell2010/haskellch13.html Control.Monad], [http://www.haskell.org/onlinereport/haskell2010/haskellch20.html Data.List]
stable versions of common libraries. Developers: [http://hackage.haskell.org/packages/upload.html upload your cabalised packages] to hackageDB (if you don't have a login, just ask).
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and [http://www.haskell.org/onlinereport/haskell2010/haskellch41.html System.IO]. In GHC these are all grouped into the 'base' package.
[http://hackage.haskell.org/packages/archive/recent.html Recent packages uploaded to HackageDB].
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  +
=== The GHC standard libraries ===
  +
GHC comes with an expanded version of the Haskell 2010 libraries. Together these are called the [http://www.haskell.org/ghc/docs/latest/html/libraries/index.html GHC standard libraries]. Changes to these libraries are handled by the package maintainer if one exists, or the [[Library submissions]] process if not. [http://www.haskell.org/hoogle/ Hoogle] - the Haskell API Search Engine - indexes the [http://www.haskell.org/ghc/docs/latest/html/libraries/index.html GHC standard libraries].
  +
  +
Examples of libraries, or packages, that belong to this group are:
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[http://hackage.haskell.org/package/bytestring bytestring],
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[http://hackage.haskell.org/package/containers containers] and [http://hackage.haskell.org/package/Win32 Win32].
  +
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=== Haskell Platform libraries ===
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On top of the GHC standard libraries, the [http://www.haskell.org/platform/ Haskell Platform] comes preinstalled with some additional packages that together form the [http://www.haskell.org/platform/contents.html#packages-and-documentation Haskell Platform libraries]. These libraries have been thoroughly tested before being included. The addition of these libraries with the [http://www.haskell.org/platform/ Haskell Platform] is what makes it 'batteries included'.
  +
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Examples of included packages are: [http://hackage.haskell.org/package/mtl Monad transformer library], [http://hackage.haskell.org/package/parallel parallel] and [http://hackage.haskell.org/package/QuickCheck QuickCheck].
  +
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=== The Hackage database ===
  +
[http://hackage.haskell.org/packages/archive/pkg-list.html Hackage] is the final layer of the Haskell library collections. [http://hackage.haskell.org/packages/archive/pkg-list.html Hackage] aims to provide a comprehensive collection of released Haskell packages, similar to Perl's CPAN or Python's PyPI.
  +
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Start on [http://hackage.haskell.org/packages/archive/pkg-list.html Hackage] if you are looking for some functionality that did not come preinstalled with the [http://www.haskell.org/platform/ Haskell Platform].
  +
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See also the [[Hackage|Hackage wiki page]] and [[Cabal/How to install a Cabal package | how to install a Cabal package]].
   
 
== Haskell applications and libraries ==
 
== Haskell applications and libraries ==
   
Applications, libraries and tools for Haskell or written in Haskell:
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Applications, libraries and tools for Haskell or written in Haskell have been classified below, but you should check [http://hackage.haskell.org/packages/archive/pkg-list.html Hackage] for the latest list.
   
 
* [[/Music and sound/|Audio, music and sound]]
 
* [[/Music and sound/|Audio, music and sound]]
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* [[/Extended Haskell/]]
 
* [[/Extended Haskell/]]
 
* [[/Games/]]
 
* [[/Games/]]
* [[/Genetic programming/]]
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* [[/Generic programming/]]
* [[/GUI libraries|Graphical User Interface Libraries]]
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* [[/GUI libraries|Graphical User Interface (GUI) Libraries]]
 
* [[/Graphics/]]
 
* [[/Graphics/]]
 
* [[/Hardware verification/]]
 
* [[/Hardware verification/]]
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* [[/Operating system/|Operating systems and systems programming]] (also emulators)
 
* [[/Operating system/|Operating systems and systems programming]] (also emulators)
 
* [[/Program development/]]
 
* [[/Program development/]]
* [[/Robots/]]
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* [[/Robotics/]]
 
* [[/Theorem provers/]]
 
* [[/Theorem provers/]]
 
* [[/Interfacing other languages|Tools for interfacing with other languages]]
 
* [[/Interfacing other languages|Tools for interfacing with other languages]]
* [[/Web programming|Web, HTML, XML]]
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* [[Web|Web, HTML, XML]]
   
 
Other places to look include:
 
Other places to look include:
* The [[Library]] hierarchy page on this wiki
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* The [[Library]] hierarchy page on this wiki.
* The Haskell [http://haskell.org/communities/ community reports]
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* The Haskell [[Haskell Communities and Activities Report|community reports]].
* The archives of the [[Haskell Weekly News]]
 
 
* The [http://www.haskell.org/mailman/listinfo/libraries mailing list] for discussion of issues related to libraries.
 
* The [http://www.haskell.org/mailman/listinfo/libraries mailing list] for discussion of issues related to libraries.
* freshmeat.net has [http://freshmeat.net/browse/834/?topic_id=834 an alternative list of software written in Haskell]
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You can also [http://www.reddit.com/r/haskell_proposals/top/?t=month propose and vote on new libraries] that you'd like on [http://www.reddit.com/r/haskell reddit], and look at our past [http://hackage.haskell.org/trac/summer-of-code/ Summer of Code proposals].
   
 
== Guidelines for developers ==
 
== Guidelines for developers ==
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* [[How to write a Haskell program|How to write a new Haskell library]]
 
* [[How to write a Haskell program|How to write a new Haskell library]]
* [http://pupeno.com/2006/12/12/the-lambda-revolution-v/ Creating a .deb from a Haskell Cabal package]
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* [[Library submissions|How to propose changes to the standard libraries]]
* [http://cgi.cse.unsw.edu.au/~dons/blog/2006/12/11 Creating a Haskell library by example]
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* [http://web.archive.org/web/20071011215053/http://pupeno.com/2006/12/12/the-lambda-revolution-v/ Creating a .deb from a Haskell Cabal package] (in the Web Archive)
 
* Guide to making standard [[Library submissions|library submissions]]
 
* Guide to making standard [[Library submissions|library submissions]]
* If you notice the library documentation is lacking, or could be improved, [http://haskell.org/haskellwiki/Improving_library_documentation please report it here]
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* If you notice the library documentation is lacking, or could be improved, [http://www.haskell.org/haskellwiki/Improving_library_documentation please report it here]
* [http://www.google.com/codesearch Google Code Search] can help identify common idioms, improving your API
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* [http://www.google.com/codesearch Google Code Search] can help identify common idioms, improving your API.
* [[Wanted libraries]]: if you can't find a library for a problem, document it here, and someone might write it.
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* [[Future projects]], more projects people would like.
* Project activity for some of the larger Haskell projects is graphed [http://www.cse.unsw.edu.au/~dons/images/commits/community/ here].
 
 
* [[Cabal]], The Common Architecture for Building Applications and Libraries, is a framework for packaging, building, and installing any tool developed in the Haskell language.
 
* [[Cabal]], The Common Architecture for Building Applications and Libraries, is a framework for packaging, building, and installing any tool developed in the Haskell language.
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* [[Hack-Nix]], a set of tools based on the [http://nixos.org Nix] package manager to manage multiple setups to build a project
   
 
Proposals for the module name space layout that can be used to guide the construction of new libraries.
 
Proposals for the module name space layout that can be used to guide the construction of new libraries.
   
* [http://www.haskell.org/~simonmar/lib-hierarchy.html Simon Marlow's current guide]
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* [[Hierarchical module names|Almost current guide]]
 
* [http://www.cs.york.ac.uk/fp/libraries/layout.html Proposal 1]
 
* [http://www.cs.york.ac.uk/fp/libraries/layout.html Proposal 1]
 
* [http://www.cs.york.ac.uk/fp/libraries/layoutSM.html Proposal 2]
 
* [http://www.cs.york.ac.uk/fp/libraries/layoutSM.html Proposal 2]
   
== Libraries for other languages ==
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=== Libraries for other languages ===
   
 
If you are thinking about designing a new library for Haskell, you ought to look what has been done in other languages. Here are standard library definitions for
 
If you are thinking about designing a new library for Haskell, you ought to look what has been done in other languages. Here are standard library definitions for
   
* [http://www.cs.ru.nl/~clean/Download/Download_Libraries/body_download_libraries.html Clean]
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* [http://wiki.clean.cs.ru.nl/Libraries Clean]
* [http://www.standardml.org/Basis Standard ML]
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* [http://www.standardml.org/Basis/ Standard ML]
 
* [http://caml.inria.fr/pub/docs/manual-ocaml/manual034.html Objective Caml]
 
* [http://caml.inria.fr/pub/docs/manual-ocaml/manual034.html Objective Caml]
 
* [http://srfi.schemers.org/ Scheme]
 
* [http://srfi.schemers.org/ Scheme]

Latest revision as of 18:53, 9 February 2013


The number of Haskell packages is growing rapidly. The section 'Haskell library collections' gives an ordering of all these packages by relative importance. In the section 'Haskell applications and libraries' an ordering by category is given. Finally some guidelines for developers of new packages are presented.

Contents

[edit] 1 Haskell library collections

[edit] 1.1 Haskell Prelude

The most important Haskell library is called the Prelude. It is implicitly imported by default, and includes the most commonly used functions. Make sure you know what they do and how to use them effectively.

[edit] 1.2 The Haskell 2010 libraries

The Haskell 2010 Language and library specification defines a set of libraries with basic functionality which all Haskell implementations should support, including the Prelude. Changes to these libraries are handled by the Haskell' process.

Haskell modules that almost everybody uses are in this group, for example: Control.Monad, Data.List and System.IO. In GHC these are all grouped into the 'base' package.

[edit] 1.3 The GHC standard libraries

GHC comes with an expanded version of the Haskell 2010 libraries. Together these are called the GHC standard libraries. Changes to these libraries are handled by the package maintainer if one exists, or the Library submissions process if not. Hoogle - the Haskell API Search Engine - indexes the GHC standard libraries.

Examples of libraries, or packages, that belong to this group are: bytestring, containers and Win32.

[edit] 1.4 Haskell Platform libraries

On top of the GHC standard libraries, the Haskell Platform comes preinstalled with some additional packages that together form the Haskell Platform libraries. These libraries have been thoroughly tested before being included. The addition of these libraries with the Haskell Platform is what makes it 'batteries included'.

Examples of included packages are: Monad transformer library, parallel and QuickCheck.

[edit] 1.5 The Hackage database

Hackage is the final layer of the Haskell library collections. Hackage aims to provide a comprehensive collection of released Haskell packages, similar to Perl's CPAN or Python's PyPI.

Start on Hackage if you are looking for some functionality that did not come preinstalled with the Haskell Platform.

See also the Hackage wiki page and how to install a Cabal package.

[edit] 2 Haskell applications and libraries

Applications, libraries and tools for Haskell or written in Haskell have been classified below, but you should check Hackage for the latest list.

Other places to look include:

You can also propose and vote on new libraries that you'd like on reddit, and look at our past Summer of Code proposals.

[edit] 3 Guidelines for developers

(thumbnail)
Built with Cabal

Developer guides:

Proposals for the module name space layout that can be used to guide the construction of new libraries.

[edit] 3.1 Libraries for other languages

If you are thinking about designing a new library for Haskell, you ought to look what has been done in other languages. Here are standard library definitions for