Recently I began rewriting the framework that powers this blog (gtfo) in haskell. Among other things, I needed a good tree rewriting utility for processing templates and generating content. I've been using Lift at work for a while now, so I built hquery, which is basically an implementation of Lift's CSS Selectors over xmlhtml trees. You can see some examples of the kind of transformations it allows in hquery's readme. Additionally, it is available from hackage via cabal install hquery.

Feedback is welcome, as this is my first haskell API. Bug reports and patches are of course welcome too :-)