Cache4j is a cache for Java objects with a simple API and fast implementation. It features in-memory caching, a design for a multi-threaded environment, both synchronized and blocking implementations, a choice of eviction algorithms (LFU, LRU, FIFO), and the choice of either hard or soft references for object storage.

Tangosol is acquired by Oracle, a leading provider of reliable in-memory data grid software. Tangosol is the latest addition to the Oracle Fusion Middleware product family. Tangosol provides a proven reliable in-memory data grid technology designed to meet the new demands for real-time data analytics, compute intensive middleware and high performance transactions—often referred to as Extreme Transaction Processing (XTP). Coupled with Oracle Fusion Middleware, Oracle TimesTen, and Oracle Database, the combination will create the first integrated platform that enables extreme transaction.