AlgART Libraries is a collection of Java libraries for processing arrays and matrices. It features63-bit addressing of array elements (64-bit long int indexes), a memory model concept (allowing data to be stored using different schemes, from RAM to mapped disk files), wide usage of lazy evaluations, built-in multithreading optimization for multi-core processors, and a wide set of image processing algorithms over matrices. Almost all classes and methods are thoroughly documented via JavaDoc.
gedcom4j is a Java library for loading (parsing) and saving GEDCOM 5.5 or 5.5.1 files to/from a Java object hierarchy, which can be manipulated by your code as you see fit. Please note that gedcom4j is not an application. It is a library for parsing, manipulating, and writing GEDCOM data in your own programs.