Functional Lens (on Mathematics and Computation)
These are articles from the blog at http://kennknowles.com/blog which demonstrate functional programming ideas, libraries, or both.
The articles are mostly literate Haskell + markdown. The code is licensed under the Apache 2.0 License so you should be able to use it in whatever way you like. I ask that the actual text of the article not be reproduced in an expository context except to quote it or cite it. I'm sure it isn't particularly valuable to anyone except for entertainment anyhow. Be nice :-)
Copyright & License
Copyright 2007-2012 Kenneth Knowles
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.