Nosql dB, which one you need?

Allegrograph
Company/organization:	Franz Inc.
Type:	Graph
Introduction:	Modern, high performance, persistent graph database.
Storage Solution:	Disk Based, meta-data and data triples.
API (s ):	SPARQL, PROLOG
Berkleydb
Company/organization:	Oracle
Type:	Key/value
Introduction:	C language embeddable library for enterprise-grade, concurrent, Transactional storage services. Thread safe to avoid data upload uption or Loss
Storage Solution:	B-tree, hash table, persistent queue
API (s ):	C, C ++ and Java
Note:	Use berkleydb XML layer on top of berkleydb for XML based Applications. Comparison Of berkleydb and relational databases
Bigtable
Company/organization:	Google
Type:	Sparse, distributed, persistent multidimen1_sorted map.
Introduction:	Distributed Storage System for structured data. Data Model provides Dynamic control over data layout and format. Data can live in memory or On disk.
Storage Solution:	Data is stored as an uninterpreted array of bytes. Client Applications can create structured and semi-structured data inside Byte arrays.
API (s ):	Python, gql, sawzall API, rest, various.
Note:	Overview: bigtable: Distributed Storage System for structured data (PDF format)
Cassandra
Company/organization:	Apache
Type:	Dimen1_hash table
Introduction:	Highly Scalable Distributed Database. combinesdynamo's distributed design and bigtable's column Family data model.
Storage Solution:	Clusters of multiple keyspaces. The keyspace is a name space Column families. columns are comprised of a name, value and timestamp.
API (s ):	Java, Ruby, Perl, Python, C #, thrift framework.
Note:	Open sourced by Facebook in 2008. wiki, FAQ, examples
Couchdb
Company/organization:	Apache
Type:	Document
Introduction:	Distributed Database with incremental replication, bi-directional Conflict Detection and management.
Storage Solution:	Ad-hoc and schema-free with a flat address space.
API (s ):	Restful json api. Javascript query language.
Note:	Couchdb introduction, Technical Overview
Db4o
Company/organization:	Versant
Type:	Object
Introduction:	Java and. Net dual license (commercial and open source) object Database.
Storage Solution:	Data Objects are stored in the way they are defined in Application.
API (s ):	Java,. Net ages.
Note:	Db4o db4o Database runtime engine, about db4o
Dovetaildb
Company/organization:	Millstone creative works
Type:	JSON-based
Introduction:	Schemaless database similar to Amazon's simpledb. Open source, Standalone Java application server.
Storage Solution:	JSON data format, "bags" (similar to tables ).
API (s ):	HTTP and JavaScript APIs
Note:	Dovetaildb Javascript API reference manual
Dynomite
Company/organization:	Cliff moon
Type:	Key/value
Introduction:	Open source Amazon Dynamo clone written in Erlang.
Storage Solution:	Distributed Key/valve store, pluggable storage engines.
API (s ):	Thrift API
Note:	Dynomite Wiki
Extreme Scale
Company/organization:	IBM
Type:	In-memory GRID/Cache
Introduction:	Distributed cache processes, partitions, replicates and manages data Using SS servers.
Storage Solution:	Data and database cache, "near cache" for local subset of data. Java Persistent cache. Map reduce support.
API (s ):	Java APIs, rest Data Service
Note:	Extreme scale document Library web site
GT. m
Company/organization:	Fiis
Type:	Hierarchical, multi-dimen1_sparse arrays, content associative Memory
Introduction:	Small footprint, multi-dimen1_array with fill support for Acid Transactions, optimistic concurrency and software transactional memory.
Storage Solution:	Unstructured array of bytes. can be key/value, document oriented, Schema-less, dictionary or any other data model.
API (s ):	Mumps, C/C ++, SQL
Note:	GT. m FAQ
Hamsterdb
Company/organization:	Christoph Rupp
Type:	Embedded Storage Library
Introduction:	Lightweight embedded database engine. Supports on disk and in memory Databases.
Storage Solution:	B + tree with variable length keys.
API (s ):	C ++, Python,. NET and Java
Note:	Hamsterdb FAQ, examples, tutorial
Hbase
Company/organization:	Apache
Type:	Sparse, distributed, persistent multidimen1_sorted map.
Introduction:	Open source, distributed, column-oriented, "bigtable like" Store
Storage Solution:	Data row has a sortable row key and an arbitrary number of columns, Each containing arrays of bytes.
API (s ):	Java API, thrift API, restful API
Note:	Part of Apache hadoop project. hbase wiki, FAQs
Hypertable
Company/organization:	Zvents Inc.
Type:	Sparse, distributed, persistent multidimen1_sorted map.
Introduction:	High Performance Distributed Data Storage System designed to run on Distributed filesystems (but can run on local filesystems). modeled After Google bigtable.
Storage Solution:	Row key (Primary Key), column family, column qualifier, time stamp.
API (s ):	C ++, thrift API, hql
Note:	Hypertable processing tural Overview, FAQ
Infinispan
Company/organization:	JBoss community
Type:	GRID/Cache
Introduction:	Scalable, highly available, Peer to Peer, data grid platform.
Storage Solution:	Key/value pair with optional expiration lifespan.
API (s ):	Java, PHP, Python, Ruby, c
Note:	Infinispan FAQ, Wiki
Infogrid
Company/organization:
Type:	Graph
Introduction:	Internet graph database made up on nodes and edges. Supports In-memory and persistent storage alternatives including RDBMS, file System, file grid, and custom storage.
Storage Solution:	Nodes (meshobjects) and edges (Relationships). meshobjects can have Entity types, properties and particle age in relationships. meshobjects Raise events.
API (s ):	Restful Web Services.
Note:	Infogrid overview, FAQ
Keyspace
Company/organization:	Scalien
Type:	Key/value
Introduction:	Distributed (Master/Slave) Key-value data store delivering strong Consistency, fault-tolerance and high availability.
Storage Solution:	Uses berkeleydb library for local storage. Key/value pairs and Their state are replicated to multiple servers.
API (s ):	C/C ++, Python, PHP, HTTP
Note:	Keyspace overview, FAQ
Memcacheddb
Company/organization:
Type:	Key/value
Introduction:	High performance, high realiability persistent storage engine Key/value object storage.
Storage Solution:	Uses berkeleydb as storage library/backend.
API (s ):	Memcache protocol, C, Python, Java, Perl
Note:	Memcachedb complete Guide (PDF format)
Mnesia
Company/organization:	Ericsson
Type:	Key/value
Introduction:	Multiuser distributed database including support for replication and Dynamic reconfiguration.
Storage Solution:	Organized as a set of tables made up of Erlang records. Tables also Have properties including type location, persistence, etc.
API (s ):	Erlang
Note:	Mnesia reference Manual
MongoDB
Company/organization:	10gen
Type:	Document
Introduction:	Scalable, high-performance, open source, schema-free, Document-oriented database
Storage Solution:	JSON-like Data schemas, dynamic queries, indexing, replication, Mapreduc
API (s ):	C, C ++, Java, JavaScript, Perl, PHP, Python, Ruby, C #, Erlang, go, Groovy, Haskell, Scala, F #
Note:	MongoDB documentation Index
Neo4j
Company/organization:	NEO technology
Type:	Graph
Introduction:	Embedded, small footprint, disk based, transactional graph database Written in Java. Dual license-free and inclucial.
Storage Solution:	Graph-oriented data model with nodes, relationships and properties.
API (s ):	Java, Python, Ruby, Scala, groovy, PHP, restful API.
Note:	Neo4j wiki, API, FAQ
Redis
Company/organization:
Type:	Key/value
Introduction:	Key/value store with the dataset kept in memory and saved to disk Asynchronously. "Not just another key-value DB"
Storage Solution:	Values can be strings, lists sets and sorted sets.
API (s ):	Python, Ruby, PHP, Erlang, Lua, C, C #, Java, Scala, Perl
Note:	Redis Wiki
Simpledb
Company/organization:	Amazon
Type:	Item/attribute/value
Introduction:	Scalable WEB service providing data storage, query and indexing in Amazon's cloud.
Storage Solution:	Items (like rows of data), attributes (like column headers), and Values (can be multiple values)
API (s ):	Soap, rest
Note:	Simpledb FAQ, getting Started Guide, developer Guide, API
Tokyo Cabinet
Company/organization:	Mikio hirabayashi
Type:	Key/value
Introduction:	Library (written in C) of functions for managing files of key/value Pairs. multi-thread support.
Storage Solution:	Keys and values can have variable byte length. binary data and Strings can be used as a key and a value.
API (s ):	C, Perl, Ruby, Java, Lua.
Note:	Tokyo cabinet specifications, presentation (PDF Format). Also available: Tokyo tyrant (remote service), Tokyo distopia (Full text search), Tokyo Promenade (Content Management ).
Voldemort
Company/organization:	LinkedIn
Type:	Hash table
Introduction:	"It is basically just a big, distributed, persistent, fault-tolerant Hash table. "high performance and availability.
Storage Solution:	Each key is unique to a store. Each key can have at most one value. Supported types: JSON, String, identity, protobuf, Java-serialization.
API (s ):	Java, C ++, and custom clients
Note:	Project Voldemort wiki, client How-