SAGA - System for Automated Geoscientific Analyses - is a Geographic Information System (GIS) software with immense capabilities for geodata processing and analysis. SAGA is programmed in the object oriented C++ language and supports the implementation of new functions with a very effective Application Programming Interface (API). Functions are organised as modules in framework independent Module Libraries and can be accessed via SAGA’s Graphical User Interface (GUI) or various scripting...
geoLucene is an extension of Lucene that allows to effectively index and search documents that contain locational information (longitude/latitude). It uses R-tree as a spacial index. See http://www.gossamer-threads.com/lists/lucene/java-dev/53378.