A very easy to use application for teaching and information purpose.
Maps of countries, states, cities, particular areas can be marked with specified notes.
Notes can be seen by just hovering over the place marks.
A collection of small utility programs to process geographic information and GPS data. Each program is written in Java and simple enough to be easy to understand. E.g. GTOPO30 to JPG, GLCC20 to JPG, GPX reader.
WKB4J is a Java library designed to read the Well-Known Binary format from a database and transform this data into corresponding Java objects. It supports several different GIS toolkits (JTS, PostGIS, OpenMap...).