Have anyone ever used Delphi with NoSQL databases like Mongo, CouchDB or others? Which one would you recommend?
For Mongo, theres TMongoWire and pebongo (early stages). For couchDB, I believe one would interact mainly through HTTP/JSON For Cassandra, I believe the best bet would be to somehow incorporate a supported language inside your Delphi app and use that to interact with Cassandra, or else implement a web service in a supported language and make it accessible to your Delphi application.
Hope it helps.