JDBCPersistence is an Object Relational Mapping framework. Designed for use in high volume online banking applications, the package delivers performance matching that exhibited by hand-written JDBC code. It uses a bytecode generation technique to create bytecode for classes that implement logic used for persisting the data. As the framework uses SQL for querying data, the learning curve is reduced. The footprint of the package is under 200KB.
JHeatChart is a one class Java API for generating heat map charts that was created because very few charting APIs seem to contain the facility to create heat maps. It is not a full featured charting API and cannot be used to other charts. The generated charts are created as Java Image objects, which can be incorporated into a GUI or saved to a file.
JOPE is an implementation of the SOPE server and concepts in Java 1.5. It provides (yet another) templating engine modelled after the WebObjects one, as well as database access libraries and other features. JOPE applications can be deployed into a Servlet container or run standalone using the Jetty HTTP server.
JRel is a library for the Java language that can be used to construct database queries in a programmatic fashion using a subset of the relational algebra. These queries are expressions in the form of 100% native Java code, and are translated at runtime into compliant ANSI-SQL usable with a variety of SQL databases.
JSDAI is a toolkit around STEP or ISO 10303, the STandard for the Exchange of Product model data. It supports the Express data modelling language as defined in ISO 10303-11 and provides data exchange capabilities according to ISO 10303-21 STEP-file and ISO 10303-28 STEP-XML. JSDAI Runtime is an API according ISO 10303-22, the Standard Data Access Interface (SDAI) for the Java programming language, ISO 10303-27. JSDAI Developer is for the development of Express data models, including Express-G diagrams.
JWPL is a language independent, database-driven, high performance Wikipedia API that provides structured access to information nuggets like redirects, categories, articles, and link structure. It contains a Mediawiki Markup parser that can be used to further analyze the contents of a Wikipedia page or standalone with other text, TimeMachine, which reconstructs a snapshot of Wikipedia from a specific date, or multiple snapshots from a time span, and RevisionMachine, which offers efficient access to the history of articles using a dedicated storage format which decreases storage space by 98%. This enables random access to the whole revision history without requiring several terabytes of storage for a single Wikipedia dump.
JayBird is JCA/JDBC driver suite for connecting to Firebird database servers. It was based on Borland's InterClient JDBC driver and uses the new JCA standard, which specifies an architecture in which an application server can cooperate with a driver so that the application server manages transactions, security, and resource pooling, and the driver supplies only the connection functionality. It also supports JDBC.