Yesod Web Framework
This page covers the following topics related to Haskell : Basics, Introduction, Haskell, Basics, Shakespearean Templates, Widgets, Yesod, Typeclass, Routing and Handlers, Forms, Sessions, Persistent, Deploying your Webapp, Advanced, RESTful Content, Yesod’s Monads, Authentication and Authorization, Scaffolding and the Site Template, Internationalizatio, Creating a Subsite, Understanding a Request, SQL Joins, Yesod for Haskellers, Examples, Initializing data in the foundation datatype, Blog: i18n, authentication, authorization, and database, Wiki: markdown, chat subsite, event source, JSON Web Service, Case Study: Sphinx-based Search, Visitor counter, Single process pub-sub, Environment variables for configuration, Route attributes, Appendices, monad-control, Web Application Interface, Settings Types, http-conduit, xml-conduit.
Author(s): NA
NA Pages 
This note describes the basics of Haskell including installation and variables and gradually progressing to more advanced concepts such as monads, type classes, performance, and specialized tasks like graphical user interfaces and working with databases. The document also includes information on libraries, testing, packaging, and the Foreign Function Interface.
Author(s): en.wikibooks.org
683 Pages
A Gentle Introduction to Haskell 98 Yale
The PDF covers the following topics related to Haskell Programming : Introduction, Values, Types, and Other Goodies, Functions, Case Expressions and Pattern Matching, Type Classes and Overloading, Types, Again, Input/Output, Standard Haskell Classes, About Monads, Numbers, Modules, Arrays.
Author(s): Paul Hudak, John Peterson, Joseph Fasel, Department of Computer Science, Yale University, University of California
64 Pages
