We use the Neo4j graph database quite extensively, so a Neo4j driver / client SDK would be nice. And for intra service messaging we need a google cloud pubsub client library.
I know there are a few different protobuf impls floating around. Not sure how much google pubsub needs beyond that. It's probably not so far away. Maybe you can be the one to do the pubsub wrapper. :-) (I'm only trying to encourage, not enlist/conscript.)