HeliDB is a database for persisting key—value pairs from Java programs. Users have many choices in configuring what features they want the database to have and in how the data is stored. Features are for instance transactions and fast B+ trees.
Tokyo Cabinet is the successor of QDBM, a high performance database library similar to the DBM family. It also supports hash and B-tree databases and does not require any server process. The overall speed is improved compared to QDBM.
VDDBMS is a middleware for managing data sources (DBMS) from different vendors to form a virtual DDBMS. It supports fragmentation and replication. The core engine is written in C++. Binding for scripting language is available as well as network access.
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A tool to query arrays in memory using SQL.
It groups the arrays in tables and returns arrays as result set.
It can be used in spreadsheets, as a script language library and everywhere is needed an interactive tool to query data in memory.
LML (LightweightModelLayer) is a small but reliable Java persistence engine using annotations and zero XML configuration. Check the WIKI at http://www.paquitosoft.com/dokuwiki/doku.php?id=lightweight_model_layer_lml
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A disk based production quality RTree based upon Guttmans quadratic split algorithm having following features:
Buffering with dirty write,
Index joins,
Tree Seeding,
Window and NN queries,
Runtime STR Packing capability,
Completely Thread safe.
JalistoPlus is lightweight, transactional, 100% pure Java database. It is object oriented and is able to directly persist and query for Java object graphs. It has modular design and may be used either in single or multi-threaded mode.
SQL2JAVA is a SIMPLE, PRAGMATIC and POWERFUL code GENERATOR.
It maps any relational schema to a java API dedicated to
access your database schema.
It supports Oracle, SQLServer, PostgreSQL, MySQL, Sybase, HSQL, etc...
2 minutes to install/try...
insideApps from determyne: Transaction-level performance monitoring for J2EE applications. Correlates and reports on transactions across HTTP server, J2EE container, and database layers. Pinpoints the source of performance issues in real time.
Finevayler is Javalibrary aimed to overcome some evident inconveniences of the famous Prevayler such as:
separate class for each kind of transaction; transactions cannot reference business object directly; and probably some others.
Small, simple and robust database in Java. If you need a persistent hash map, this is for you. It is basically as fast as it gets without caching, but doesn't offer any non-basic features like transactions or concurrent access.
Very small database, forked from TinySQL (but later rewritten from scratch) for the study of good software writing and Database theory knowledge. Currently works with flat (TXT) files. Will use DBF, XLS, CSV, memory tables and SQLite formats.
SimpleSQL is a 64-bit relational database, works as a standalone server-free db. component and transactional db. server, with standard SQL and JDBC, has portable single db. file, first db. available in Java and C++.
The Genomic Diversity and Phenotype Connection (GDPC) written in JAVA uses web services to make XML formatted data publicly available. The GDPC Browser (front-end GUI) can access these services, and other applications can use the API.
This is an experiment in creating the best database API I can come up with. It is an alternative to query languages. The latest version is being written in Scala using Berkeley DB Java and will run on the Java VM.
Salto Persistence is a object/relational persistence framework for a J2EE environment. It comes with Salto-db generator which uses a templates mechanism to generate Salto-db Dataobjects from any existing JDBC-supported Database.
tinySQL is a SQL engine written in Java. It uses dBase format files compatible with MS Excel. tinySQL comes with a command line interpreter which you can use to create, drop, or update tables. A GUI for tinySQL can be found at www.sqlmagic.com
OpenSiteSearch is the new Open Source version of OCLC's original java-based web application for building Z39.50 portals (i.e. virtual union catalogues). This project is specifically aimed at the library community.
Java Object and Relation Persistence framework. No mapping configuration needed! Automatic mapping of object relations, inheritance, arrays ++. Also includes a DB-version migration framework. Powerful, yet easy to use.
XSpace is a globally accessible repository for hierarchically-keyed information. It provides persistence for trees with an elegant tree-navigation API. XSpace also publishes real-time events whenever a persisted tree is updated.