Querydsl is a framework that enables the construction of statically typed SQL-like queries. Instead of writing queries as inline strings or externalizing them into XML files, they can be constructed via a fluentDSL/API like Querydsl. It supports JPA, JDO, Java Collections, SQL via JDBC, Lucene, and Hibernate Search.
radlib is a C language library developed to abstract details of interprocess communications and common Linux/Unix system facilities so that application developers can concentrate on application solutions. It encourages developers to use a proven paradigm of event-driven, asynchronous design. By abstracting interprocess messaging, events, timers, and any I/O device that can be represented as a file descriptor, radlib simplifies the implementation of multi-purpose processes, as well as multi-process applications. In short, radlib is a sincere attempt to provide real-time OS capability on a non-real-time OS.
SQL Uniform is a database comparison and SQL query program. It is a database client with a graphical user interface. It supports any kind of database and database servers to which there is an ODBC or JDBC standard driver. It has been tested on Access, Adabas D, DaffodilDB, dBASE, Excel, HSQL, IBM DB2, Interbase (Firebird), JDataStore, Linter (Relex), McKOI, Mimer, MSSQL, MySQL, Openlink Virtuoso, Oracle, Paradox, Pervasive (Btrive), Pointbase, PostgreSQL, Solid, SQLITE, Sybase, ThinkSQL, and Yard.
Sequoia provides high availability and performance scalability for databases. It is is the continuation of the C-JDBC project. It provides transparent database clustering (partitioning, replication, etc.). It works with any Java application without code modification and with any database engine. It has been successfully tested with Tomcat, JBoss, JOnAS, WebSphere, MySQL, PostgreSQL, Apache Derby, HSQLDB, SAP DB, Oracle, DB2, Sybase, MS SQL Server, Firebird, and more.