vty is a terminal GUI library in the niche of ncurses, intended to be easy to use and to provide good support for common terminal types.

The Scripting.Lua module is a wrapper of the Lua language interpreter as described in https://www.lua.org/.

The ghc-lib-parser-ex package contains GHC API parse tree utilities.

This package provides low-level bindings to the zlib package.

GHC 7.4 introduced a new casMutVar PrimOp which is difficult to use safely, because pointer equality is a highly unstable property in Haskell. This library provides a safer method based on the concept of Tickets.

This library provides an efficient implementation of Int-indexed arrays (both mutable and immutable), with a powerful loop optimisation framework.

th-reify-many provides functions for recursively reifying top level declarations. The main intended use case is for enumerating the names of datatypes reachable from an initial datatype, and passing these names to some function which generates instances.

This package exports a module which is the recommended starting point for using microlens if you aren't trying to keep your dependencies minimal. By importing Lens.Micro.Platform you get all functions and instances from microlens, microlens-th, microlens-mtl, microlens-ghc, as well as instances for Vector, Text, and HashMap. The minor and major versions of microlens-platform are incremented whenever the minor and major versions of any other microlens package are incremented, so you can depend on the exact version of microlens-platform without specifying the version of microlens you need. This package is a part of the microlens family; see the readme on Github.

This library uses GHC.Generics to derive efficient optics (traversals, lenses and prisms) for algebraic data types in a type-directed way, with a focus on good type inference and error messages when possible. The library exposes a van Laarhoven interface. For an alternative interface, supporting an opaque optic type, see generic-optics.

Tabular provides a Haskell representation of two-dimensional data tables, the kind that you might find in a spreadsheet or or a research report. It also comes with some default rendering functions for turning those tables into ASCII art, simple text with an arbitrary delimiter, CSV, HTML or LaTeX.

Below is an example of the kind of output this library produces. The tabular package can group rows and columns, each group having one of three separators (no line, single line, double line) between its members.

    || memtest 1 | memtest 2 ||  time test  | time test 2
====++===========+===========++=============+============
A 1 ||       hog |  terrible ||        slow |      slower
A 2 ||       pig |   not bad ||        fast |     slowest
----++-----------+-----------++-------------+------------
B 1 ||      good |     awful || intolerable |    bearable
B 2 ||    better | no chance ||    crawling |     amazing
B 3 ||       meh |   well... ||  worst ever |          ok

This package provides a new data structure for accurate on-line accumulation of rank-based statistics such as quantiles and trimmed means. . See original paper: "Computing extremely accurate quantiles using t-digest" by Ted Dunning and Otmar Ertl for more details <https://github.com/tdunning/t-digest/blob/07b8f2ca2be8d0a9f04df2feadad5ddc1bb73c88/docs/t-digest-paper/histo.pdf>.

HAProxy protocol version 1.5 support (see http://haproxy.1wt.eu/download/1.5/doc/proxy-protocol.txt) for applications using io-streams. The proxy protocol allows information about a networked peer (like remote address and port) to be propagated through a forwarding proxy that is configured to speak this protocol.

This package is a compatibility package for a singleton data type . > data Solo a = Solo a . Note: it's not a @newtype@ . @Solo@ is available in @base-4.16@ (GHC-9.2).

This package provides a family of combinators for defining webservices APIs and serving them . You can learn about the basics in the <http://docs.servant.dev/en/stable/tutorial/index.html tutorial>. . <https://github.com/haskell-servant/servant/blob/master/servant-server/example/greet.hs Here> is a runnable example, with comments, that defines a dummy API and implements a webserver that serves this API, using this package. . <https://github.com/haskell-servant/servant/blob/master/servant-server/CHANGELOG.md CHANGELOG>

This package provides the number parsers without the need to use a large (and unportable) token parser.

Haddock is a documentation-generation tool for Haskell libraries.

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.

ghc-doctest-driver-gen is a Doctest's driver file generator. It lets you automatically generate driver file for Doctest's Cabal integration.

The ListLike module provides a common interface to the various Haskell types that are list-like. Predefined interfaces include standard Haskell lists, Arrays, ByteStrings, and lazy ByteStrings. Custom types can easily be made ListLike instances as well.

ListLike also provides for String-like types, such as String and ByteString, for types that support input and output, and for types that can handle infinite lists.

This Hackage security library provides both server and client utilities for securing the Hackage package server. It is based on The Update Framework, a set of recommendations developed by security researchers at various universities in the US as well as developers on the Tor project.

The package provides mutable and immutable bit arrays.

This library provides Comonads for Haskell.

This Haskell package provides a replacement for Data.Conduit.List, as well as a convenient Conduit module.

This library provides an implementation of the older blaze-builder interface in terms of the new builder that shipped with bytestring-0.10.4.0. This implementation is mostly intended as a bridge to the new builder, so that code that uses the old interface can interoperate with code that uses the new implementation.