Hi, I'd like to announce my Event Store TCP client. It licensed under BSD3. You can find the source on Github http://github.com/YoEight/eventstore. Package is available on Hackage http://hackage.haskell.org/package/eventstore-0.5.0.0. Here's a list of supported features: * Single event writes. * Batch writes. * Transactional writes. * Stream deletion. * Single event reads. * Range reads from regular streams and from $all stream (backward and forward). * Volatile subscriptions (regular stream and $all). * Catch-up subscriptions (regular stream and $all). * Authenticated connection. Will be implemented: * Persistent subscriptions. * SSL connection. I originally wrote that library because I need it for a real project. I only implemented features I need first, so feel free to open a ticket (or better a pull request) on Github for something you need or a bug you've experienced. I'll be as fast as I can. Few notes on the code itself. This implementation uses a Functional Reactive Programming (FRP) library named Sodium https://hackage.haskell.org/package/sodium. Connection bookkeeping (operation and subscription management for instance) was amazingly easy to implement with it. I only tested that library with EventStore 3.0.1. Hope you enjoy it. Regards, Yorick