1. MtlThe Monad Transformer Library
2. GhcupDEPRECATED IN FAVOR OF haskell/ghcup-hs
3. TextAn efficient packed, immutable Unicode text type for Haskell, with a powerful loop fusion optimization framework.
5. LspHaskell library for the Microsoft Language Server Protocol
6. BytestringAn efficient compact, immutable byte string type (both strict and lazy) suitable for binary or 8-bit character data.
7. C2hsc2hs is a pre-processor for Haskell FFI bindings to C libraries
9. FglA Functional Graph Library for Haskell
13. RfcsDiscussion about proposed changes to the Haskell programming language
15. CabalOfficial upstream development repository for Cabal and cabal-install
17. FilepathLibrary for manipulating FilePaths in a cross platform way.
20. PvpHaskell Package Version Policy (PVP)
23. GhcideA library for building Haskell IDE tooling
24. CriterionA powerful but simple library for measuring the performance of Haskell code.
30. VectorAn efficient implementation of Int-indexed arrays (both mutable and immutable), with a powerful loop optimisation framework .
33. StatisticsA fast, high quality library for computing with statistics in Haskell.
39. text-icuThis package provides the Haskell Data.Text.ICU library, for performing complex manipulation of Unicode text.
41. hie-biosSet up a GHC API session for various Haskell Projects
42. zlibCompression and decompression in the gzip and zlib formats
43. tarReading, writing and manipulating ".tar" archive files.
49. primitiveThis package provides various primitive memory-related operations.
50. stmSoftware Transactional Memory