We are pleased to announce a new persistence library named Perdure. It aims to provide a simple and robust persistence mechanism for acyclic immutable data with an easily comprehensible cost-model. See the link a complete description. http://hackage.haskell.org/package/perdure-0.1.2 This is our first open source Haskell contribution. Feedback is most welcome. Patrick Prémont Founder Cognimeta Inc. ppremont@cognimeta.com Twitter: @ppremont