I really like how Amazon SimpleDB works: Attribute = Value (s) store and SELECT. I am wondering if there are alternatives that work the same but can be installed locally on my devbox and servers? I saw one open source project whose purpose is to re-implement amazon simpledb, but only requires being safe for testing purposes. Are there any stable solutions that offer almost the same features?
Ayende Rahien RavenDB is very developer friendly: http://ravendb.net/
Check out node-mdb (https://github.com/robtweed/ node-mdb). This is a node.js clone of SimpleDB.
Caution: I have not actually used ... just the project that I am looking at ...