* [The Y Combinator](http://dangermouse.brynmawr.edu/cs245/ycomb_jim.html) derives the applicative-order Y-combinator from scratch, in Scheme. This derivation is similar in flavor to the derivation found in The Little Schemer, but uses a slightly different starting approach...
* [The church of the least fixed point, by Sans Pareil](http://www.springerlink.com/content/n4t2v573m58g2755/)
+## Folds ##
+
+* [[!wikipedia Fold (higher-order function)]]
+
## Types ##
## Monads ##
* [[!wikipedia Monad (functional programming) desc="Monads in Functional Programming"]]
* [Daniel Friedman. A Schemer's View of Monads](/schemersviewofmonads.ps): from <https://www.cs.indiana.edu/cgi-pub/c311/doku.php?id=home> but the link above is to a local copy.
-* [A Gentle Intro to Haskell: About Monads](http://www.haskell.org/tutorial/monads.html)
-* [All About Monads](http://haskell.org/all_about_monads/html/index.html)
+* [A Gentle Intro to Haskell: About Monads](http://www.haskell.org/tutorial/monads.html) (link currently broken, check <http://www.haskell.org/haskellwiki/Tutorials>)
+* [All About Monads](http://haskell.org/all_about_monads/html/index.html) (also broken, here's an [archived version](http://web.archive.org/web/20071013115156/haskell.org/all_about_monads/html/index.html))
* From HaskwellWiki:
[Monad tutorials timeline](http://www.haskell.org/haskellwiki/Monad_tutorials_timeline)
| [Monad laws](http://www.haskell.org/haskellwiki/Monad_Laws)
| [Monads as containers](http://www.haskell.org/haskellwiki/Monads_as_containers)
| [What a monad is not](http://www.haskell.org/haskellwiki/What_a_Monad_is_not)
* [Haskell wikibook: Understanding monads](http://en.wikibooks.org/wiki/Haskell/Understanding_monads)
+* [Haskell wikibook: Monad Transformers](http://en.wikibooks.org/wiki/Haskell/Monad_transformers)
+* [A State Monad Tutorial](http://strabismicgobbledygook.wordpress.com/2010/03/06/a-state-monad-tutorial/)
* [You Could Have Invented Monads! (And Maybe You Already Have.)](http://blog.sigfpe.com/2006/08/you-could-have-invented-monads-and.html)
* Yet Another Monad Tutorial: [part 1](http://mvanier.livejournal.com/3917.html) [part 2](http://mvanier.livejournal.com/4305.html)
* [Monads for the Working Haskell Programmer -- a short tutorial](http://www.engr.mun.ca/~theo/Misc/haskell_and_monads.htm)
* [Pointers in OCaml](http://caml.inria.fr/resources/doc/guides/pointers.html)
-## The Curry-Howard Correspondence ##
-* The [[!wikipedia Curry-Howard isomorphism]]
-* [The Curry-Howard correspondence in Haskell](http://www.thenewsh.com/~newsham/formal/curryhoward/)
-* [The Curry-Howard Isomorphism](http://en.wikibooks.org/wiki/Haskell/The_Curry-Howard_isomorphism) at Haskell wiki<p>
-
-
## Continuations ##
* [[!wikipedia Continuation]]
* [Continuations In Scheme](http://tech.phillipwright.com/2010/05/23/continuations-in-scheme/)
* [Understanding Scheme Continuations](http://sanjaypande.blogspot.com/2004/06/understanding-scheme-continuations.html). This is tagged "Part I" but I think there's no further parts.
* [Continuations for Curmudgeons](http://www.intertwingly.net/blog/2005/04/13/Continuations-for-Curmudgeons) [Commentary](http://lambda-the-ultimate.org/node/643)
-* [Haskell wiki on Continuations](http://www.haskell.org/haskellwiki/Continuation)<p>
+* [Haskell wiki on Continuations](http://www.haskell.org/haskellwiki/Continuation)
+* [Haskell wikibook on Continuation Passing Style](http://en.wikibooks.org/wiki/Haskell/Continuation_passing_style)<p>
* [[!wikipedia Delimited continuation]]
* [Composable Continuations Tutorial](http://community.schemewiki.org/?composable-continuations-tutorial) at SchemeWiki
* [Post by Ken](http://lambda-the-ultimate.org/node/1197#comment-12927) on Lambda the Ultimate explaining difference between undelimited and delimited continuations
* [Delimited continuations in natural language semantics](http://okmij.org/ftp/gengo/)
+## The Curry-Howard Correspondence ##
+* The [[!wikipedia Curry-Howard isomorphism]]
+* [The Curry-Howard correspondence in Haskell](http://www.thenewsh.com/~newsham/formal/curryhoward/)
+* [Haskell wikibook on the Curry-Howard Isomorphism](http://en.wikibooks.org/wiki/Haskell/The_Curry-Howard_isomorphism) at Haskell wiki<p>
+
+
+
## Linear Logic ##
* [[!wikipedia Linear logic]]