Building a modern functional compiler from first principles. (http://dev.stephendiehl.com/fun/)

Official Haskell IDE support via the language server protocol (LSP)

The engine for haskell ide-integration. Not an IDE

Haskell source code suggestions

Miscellaneous articles. The readme is the table of contents.

Haskell LLVM JIT Compiler Tutorial

Industrial-strength monadic parser combinator library

A monadic parser combinator library

Deprecated; see https://github.com/unused-code/unused

Web application for exploring and understanding Haskell codebases

Introduction to parsing with Haskell and Parsec

Haskell Programming From First Principles - Follow-up Resources

In this article I try to explain why Haskell keeps being such an important language by presenting some of its most important and distinguishing features and detailing them with working code example…

Low-level networking interface

Parser for JavaScript, in Haskell

Write yourself a typed functional language

compile your own functional language

Code from/to the book S.L.Peyton Jones, D.Lester: Implementing Functional Languages. A Tutorial, 1992

An implementation of the Core language

A simple, general-purpose functional programming language

Haskell book exercises - http://haskellbook.com/

Haskell implementation of the categorical abstract machine