Projects

MySQL

MySQL, the most popular Open Source SQL database management system, is developed, distributed, and supported by Oracle Corporation.

PostgreSQL Database Server

PostgreSQL is a powerful, open source relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness. It runs on all major operating systems, including Linux, UNIX (AIX ... [More] , BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows. [Less]

HyperSQL Database Engine

hsqldb is a relational database engine written in Java with a JDBC driver that supports a subset of ANSI SQL:1999. It offers a small, fast database engine. Embedded and server modes are available. It includes tools such as a minimal Web server, in-memory query and management tools (which can be run ... [More] as applets or servlets, too), a test framework, PHP compatibility, Eclipse and NetBeans IDE compatibility, and a number of demonstration examples. [Less]

Firebird

Firebird is a relational database offering many ANSI/ISO SQL standard features that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers excellent concurrency, high performance, and powerful language support for stored procedures and triggers. It has been used in production ... [More] systems, under a variety of names, since 1981. Firebird is a commercially independent project of C++ programmers, technical advisors and supporters developing and enhancing a multi-platform relational database management system based on the source code released by Inprise Corp (now known as Borland Software Corp) on 25 July, 2000. Join the Firebird Foundation The software is completely free of any registration, licensing or deployment fees. It may be deployed freely for use with any third-party [Less]

Ingres Database

Ingres Database is the open source database management system that can reduce IT costs and time to value while providing the strength and features expected from an enterprise class database. Ingres Database is a leader in supporting business critical applications and helping manage the most ... [More] demanding enterprise applications of Fortune 500 companies. Focused on reliability, security, scalability, and ease of use, Ingres contains features demanded by the enterprise while providing the flexibility of open source. Core Ingres technology forms the foundation, not only of Ingres Database, but numerous other industry-leading RDBMS systems a [Less]

Neo4j - the graph database

Neo4j is a graph database. It is an embedded, disk-based, fully transactional Java persistence engine that stores data structured in graphs rather than in tables. A graph (mathematical lingo for a network) is a flexible data structure that allows a more agile and rapid style of development.

Raven DB

Raven is an Open Source (with a commercial option) document database for the .NET/Windows platform. Raven offers a flexible data model design to fit the needs of real world systems. Raven stores schema-less JSON documents, allow you to define indexes using Linq queries and focus on low latency and high performance.

SmallSQL Database

Java Desktop SQL Database Engine with JDBC 3.0 API. SmallSQL is small, fast, embeddable, SQL 99 conformance, platform independent and 100% pure Java

CloudB

CloudB covers a gray area in the data storage segment, by providing a scalable, distributable and robust system. Many would define it as being in the stream of no-SQL movement, but it's actually data-model agnostic: this means it could also support an SQL model over a distributed network. ... [More] Natively supports a variety of APIs for dispatching data management and query through several protocols (eg. HTTP, TCP/IP, etc.) and standards (notably REST) on the most common formats (binary, XML-RPC, JSON-RPC, etc.). [Less]

simpledbm

SimpleDBM is an OpenSource Transactional Database Engine in Java. It has a very small footprint and can be embedded in the address space of an application. It provides a simple programming API, which can be learned very quickly. More recently work is being done to provide a network API for remote ... [More] access. FeaturesSimpleDBM has the following features: Transactional - SimpleDBM fully supports ACID transactions. SimpleDBM uses a STEAL/NO-FORCE buffer management strategy for transactions. Multi-threaded - SimpleDBM is multi-threaded and supports concurrent reads and writes of data. Write Ahead Log - SimpleDBM uses a write ahead log to ensure transaction recovery in the event of system crashes. Lock based concurrency - SimpleDBM uses shared, update and exclusive row locks to manage concurrency. Multiple Isolation Levels - SimpleDBM supports read-committed, repeatable-read, and serializable isolation levels. B-Tree Indexes - SimpleDBM implements B-plus Tree indexes, that fully support concurrent reads, inserts and deletes. SimpleDBM B-Trees continually re-balance themselves, and do not suffer from fragmentation. Tables - SimpleDBM supports tables, but for maximum flexibility, treats table rows as blobs of data. Table rows can have any internal structure as you like, and can span multiple disk pages. Standard table rows with multiple columns are supported via add-on modules. Latches and Locks - SimpleDBM uses latches for internal consistency, and locks for concurrency. Latches are more efficient locking mechanisms that do not suffer from deadlocks. Deadlock detection - SimpleDBM has support for deadlock detection. A background thread periodically checks the lock table for deadlocks and aborts transactions to resolve deadlocks. Non FeaturesSimpleDBM is not an SQL engine. There is no support for distributed transactions (XA) yet. StatusSimpleDBM is currently in early BETA and not suitable for use in Production systems. The latest builds can be downloaded from http://code.google.com/p/simpledbm/downloads/list. LicenseSimpleDBM is licensed under GPL v2 with a clause similar to GNU Classpath Exception. NOTICEThe license has changed with the new SimpleDBM RSS 1.0.15 BETA release. A GNU Classpath Exception clause has been added to the license. [Less]