... Postgres. You wanna document store? We got your document store, right here.
pgBSON, a Postgres extension implementing support for a MongoDB-compatible BSON datatype, also recently went 1.0, signalling that it's ready for production use.
These are powerful demonstration of how adaptable Postgres is. If it's data, we can find a way to do it. And unlike a typical document store database, you can do relational-SQL stuff as well, giving you your choice of interface.
pgREST is also our first major project out of our Taiwanese community, so I'm pretty excited about it.
Of course, we're still waiting for fully indexable, binary-storage JSON in 9.4, but that's on schedule for September.