Prooph's Event-Store components now also has a Flywheel Adapter.
Flywheel is a serverless document database which only uses flat files on your local filesystem to store the data. All the events will be stored and loaded from a choosen directory. This is well suited when you bootstrap an application and you don't need a real database server right away. It can also be a good candidate for writing functionnal tests.
But of course you must not run it in production since it is not designed to handle a huge amount of events and doesn't manage transactions.
Shout-out to Matthieu Moquet (@MattKetmo) for providing this adapter.