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OpenStreetMap is a free editable map of the whole world. It allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth. It is a wikipedia for maps. It is the project that creates and provides free geographic data and mapping to anyone who wants it.
PostGIS is a spatial database extender for PostgreSQL object-relational database. It adds support for geographic objects allowing location queries to be run in SQL. PostGIS adds extra types (geometry, geography, raster and others) to the PostgreSQL database. It also adds functions, operators, and index enhancements that apply to these spatial types.
The ORMAP Parcel Editing Toolbar is a project that builds and maintains tools for editing parcel data via ESRI's ArcGIS. The tools consist of an ArcMap toolbar for use in ArcMap version 10X. CAUTION: STILL IN TEST MODE!!! 1/7/2011
Koloboke aims to replace the standard Java collections and streams with more efficient implementations. The current version of Koloboke focuses on replacing java.util.HashSet and java.util.HashMap. It provides a complete set of primitive type implementations for each collection. Its able to avoid the expensive boxing/unboxing of primitives and saves memory for boxed primitive objects. It is the fastest and the most memory efficient library implementing hash maps and sets.
OpenJUMP is a community driven fork of JUMP the quot;Java Unified Mapping Platformquot; GIS software. The original JUMP was developed by Vivid Solutions, released under GPL2 in 2003 and discontinued in 2006. During 2004 already some enthusiastic developers joined together to enhance further the features of JUMP. They launched an independent development branch called OpenJUMP. The name gives credit to the original JUMP development, and at the same time describes the objectives of this proje
The Google Guava Libraries are a nice set of Java utility classes that will probably come in handy in any project. It provides immutable collections, string manipulation, handling primitives ,easier I/O, concurrency etc. it absolutely follows the Collections API requirements. It has support for murmur hash.