Haskell Language Report
IntelliJ plugin for Haskell
Get the Haskell documentation of a name from a module
Haskell Documentation Tool
Building a modern functional compiler from first principles. (http://dev.stephendiehl.com/fun/)
Build a GHC which produces shared libraries without runtime Haskell dependencies
Platform-independent library for basic file system operations
Meta-package to facilitate impact assessment for CLC proposals
What I Wish I Knew When Learning Haskell
Template Haskell Workshop
Modified versions of Cabal & Haddock for rendering Annotated HTML with Mouseover Types.
The Happy parser generator for Haskell
Emacs mode for Haskell
Haskell LLVM JIT Compiler Tutorial
Official haskell ide support via language server (LSP). Successor of ghcide & haskell-ide-engine.