pg-mongo

For all the hate MongoDB gets, I have to say building queries in server side JS using MongoDB JSON syntax rather than SQL style queries is the way to go. Check out these two examples: https://github.com/olegp/stick-blog-pg/blob/master/lib/serve... - uses Postgres https://github.com/olegp/stick-blog/blob/master/lib/server.j... - uses MongoDB - much easier to construct dynamic queries using the JSON syntax There are of course plenty of other things a relational DB like Postgres has going for it, so I've been experimenting with having a MongoDB interface to Postgres with data stored using the JSON datatype. It's now feature complete and passes all unit tests with read performance exceeding that of Mongo in some benchmarks: https://github.com/olegp/pg-mongo

https://github.com/JerrySievert/mongolike https://github.com/olegp/pg-mongo/ and my favorite: http://pgre.st/

Yes! In fact, you can have a Mongo interface to Postgres. I've written just that for Node.js: https://github.com/olegp/pg-mongo/