Hi everyone, I'm pleased to announce Elerea, aka "Eventless reactivity", a minimalistic FRP implementation that - comes with a convenient applicative interface (similar to Reactive) - supports recursive definition of signals - supports signals fed from outside by IO actions - supports dynamism in the signal structure (I think ;) - seems to play nice with resources, especially memory - is based on some unsafePerformIO dark magic (that might easily break depending on many factors) - might have some parallelisation potential - has absolutely no formal foundations, it's just the result of some furious hacking over the last few days! There are working examples to show off the current capabilities of the library, found in the separate elerea-examples package. Have fun playing with it! Gergely -- http://www.fastmail.fm - A no graphics, no pop-ups email service