This package provides access to platform dependent file locking APIs. There are alternative file locking packages:

• GHC.IO.Handle.Lock in base >= 4.10 is good enough for most use cases. However, uses only Handles so these locks cannot be used for intra-process locking.

• ghc-filelock doesn't support OFD locking.

This library provides a wrapper to the Linux kernel's inotify feature, allowing applications to subscribe to notifications when a file is accessed or modified.

This tiny package contains the class ObjectName, which corresponds to the general notion of explicitly handled identifiers for API objects, e.g. a texture object name in OpenGL or a buffer object name in OpenAL.

This package includes Hakell modules providing various helper functions for Lists, Maybes, Tuples, Functions.

This library provides exception safe semaphores that can be used in place of QSem, QSemN, and SampleVar, all of which are not exception safe and can be broken by killThread.

This package provides a library for generating 2D charts and plots, with backends provided by the Cairo and Diagrams libraries.

This library provides implementations of concurrent FIFO queues (for both general boxed and primitive unboxed values) that are fast, perform well under contention, and offer a Chan-like interface. The library may be of limited usefulness outside of x86 architectures where the fetch-and-add instruction is not available.

This package provides a simple applicative parser in Parsec style.

This package provides Haskell bindings for the OpenGL graphics system (GL, version 4.5) and its accompanying utility library (GLU, version 1.3).

This package provides a simple (but internally ugly) memoization function.

Values of custom types usually have invariants imposed upon them. This package provides the Validity type class, which makes these invariants explicit by providing a function to check whether the invariants hold.

This package provides a simple XML library for Haskell.

This package provides a Dec type for representing deciable relations.

type Neg a = a -> Void

data Dec a
    = Yes a
    | No (Neg a)

RFC 4648-compliant Base64 with an eye towards performance and modernity (additional support for RFC 7049 standards)

This package provides bindings and types to bridge Haskell and <https://www.lua.org/ Lua>. . The full Lua interpreter version 5.4.4 is included. Alternatively, a system-wide Lua installation can be linked instead.

This package provides a small cross-platform library for reading and modifying the system clipboard. It uses xclip or xsel at runtime.

This package contains functions (like view or +=) which work on MonadReader, MonadWriter, and MonadState from the mtl package. This package is a part of the microlens family; see the readme on Github.

This Haskell library provides pointed and copointed data types.

GLib is a collection of C data structures and utility functions for the GObject system, main loop implementation, for strings and common data structures dealing with Unicode. This package only binds as much functionality as required to support the packages that wrap libraries that are themselves based on GLib.

doclayout is a pretty-printing library for laying out text documents, with several features not present in pretty-printing libraries designed for code. It was designed for use in Pandoc.

This is a library for testing code involving bottoms or infinite values. For the underlying theory and a larger example involving use of QuickCheck, see the article "Chasing Bottoms A Case Study in Program Verification in the Presence of Partial and Infinite Values".

ghc-blaze-textual is a fast Haskell library for rendering common Haskell datatypes in text form using the ghc-blaze-builder library.

Safe Haskell introduced the notion of safe and unsafe modules. In order to make as many as possible modules ``safe'', the well-known unsafe functions were moved to distinguished modules. This makes it hard to write packages that work with both old and new versions of GHC. This package provides a single module System.Unsafe that exports the unsafe functions from the base package. It provides them in a style ready for qualification, that is, you should import them by import qualified System.Unsafe as Unsafe.

This is a small library for working with changes to JSON documents. It includes a library and two command-line executables in the style of the diff and patch commands available on many systems.