Always good to see this sort of tools coming out:
Morpheus: This is a stand-alone, full feature Neo4j distribution that exposes a Neo4j database over REST together with a web-based administrative interface for said database.
Before starting to use it make sure you check the license though
Even if not functional yet, this is an extremely interesting idea:
IDBCouch is a complete implementation of the CouchDB storage and views API that supports peer-to-peer replication with other CouchDB instances. It is built on top of IndexedDatabase which is a specification that is still in flux as Mozilla implements the draft for Firefox 4.
— IDBCouch project
Suguru Namura has published a set of screenshot of a web console for Cassandra:
Even if a bit later than others - for example CouchDB has Futon, HBase has ☞ hbaseexplorer, MongoDB has quite a few: mongo3, futon4mongo and phpMoAdmin plus MongoHub, Redis has Redweb — such tools are always welcome!
Very interesting results testing serving files using Apache, nginx and GridFS.
||% Apache FS
||% nginx FS
||% nginx GridFS
||% Apache Ruby
|FS via Apache
|FS via nginx
|GridFS via nginx module
|Rails via Passanger