This package provides extensible exceptions for both new and old versions of GHC (i.e., < 6.10).

Checkers wraps up the expected properties associated with various standard type classes as QuickCheck properties. It also provides some morphism properties, arbitrary instances, and generator combinators for common data types.

This library provides a conduit-based, streaming interface for extracting and creating tar files.

LeanCheck support for test-framework. This package can be used to incorporate LeanCheck tests into test-framework test suites.

This is a Haskell library for writing CGI programs.

This package provides a Haskell module for creating 2D and 3D plots using gnuplot.

A reusable library containing hledger's core functionality. This is used by most hledger* packages so that they support the same common file formats, command line options, reports etc.

hledger is a robust, cross-platform set of tools for tracking money, time, or any other commodity, using double-entry accounting and a simple, editable file format, with command-line, terminal and web interfaces. It is a Haskell rewrite of Ledger, and one of the leading implementations of Plain Text Accounting.

This package provides algorithms on Conduits, including higher level asynchronous processing and some other utilities.

This package provides a data type These a b which can hold a value of either type or values of each type. This is usually thought of as an "inclusive or" type (contrasting Either a b as "exclusive or") or as an "outer join" type (contrasting (a, b) as "inner join").

data These a b = This a | That b | These a b

Since version 1, this package was split into parts:

• https://hackage.haskell.org/package/semialign For Align and Zip type-classes.

• https://hackage.haskell.org/package/semialign-indexed For SemialignWithIndex class, providing ialignWith and izipWith

• https://hackage.haskell.org/package/these-lens For lens combinators.

• http://hackage.haskell.org/package/monad-chronicle For transformers variant of These.

This library provides instances of Binary for the types defined in the vector package, making it easy to serialize vectors to and from disk. We use the generic interface to vectors, so all vector types are supported. Specific instances are provided for unboxed, boxed and storable vectors.

This package extends https://hackage.haskell.org/package/process. It allows you to read process input and output as ByteStrings or Text, or write your own ProcessOutput instance. It also provides lazy process input and output, and a ProcessMaker class for more flexibility in the process creation API.

The conduit package is a solution to the streaming data problem, allowing for production, transformation, and consumption of streams of data in constant memory. It is an alternative to lazy I/O which guarantees deterministic resource handling, and fits in the same general solution space as enumerator/iteratee and pipes.

This package provides a means of generating tag files for Emacs and Vim.

This package provides a low-level networking interface.

This package provides tools to parse Haskell sources to the template-haskell abstract syntax.

This package provides a type-safe tool for generating XML code via quasi-quoting built on top of ghc-shakespeare.

This package allows you to have a README.md that at the same time is a literate Haskell program.

This package provides distributive functors for Haskell. Dual to Traversable.

This Haskell package provides some useful control operators for looping.

This Haskell package is an abstract interface only. It provides a number of type clasess, but not an implementation. The type classes separate different levels of Par functionality. See the Control.Monad.Par.Class module for more details.

SecureMem is similar to ByteString, except that it provides a memory chunk that will be auto-scrubbed after it run out of scope.

Annotations are useful for coloring. This is a limited version of wl-pprint-extras without support for point effects and without the free monad. Like in annotated-wl-pprint, only annotations are supported. Compared to annotated-wl-pprint this library provides a slightly modernized interface.

Safe conversions between textual types

This package provides a fast, reliable priority queue implementation based on a binomial heap.