geojson-vt - Slice GeoJSON into vector tiles on the fly in the browser

•    Javascript

A highly efficient JavaScript library for slicing GeoJSON data into vector tiles on the fly, primarily designed to enable rendering and interacting with large geospatial datasets on the browser side (without a server).Created to power GeoJSON in Mapbox GL JS, but can be useful in other visualization platforms like Leaflet and d3, as well as Node.js server applications.

rbush - RBush — a high-performance JavaScript R-tree-based 2D spatial index for points and rectangles

•    Javascript

RBush is a high-performance JavaScript library for 2D spatial indexing of points and rectangles. It's based on an optimized R-tree data structure with bulk insertion support. Spatial index is a special data structure for points and rectangles that allows you to perform queries like "all items within this bounding box" very efficiently (e.g. hundreds of times faster than looping over all items). It's most commonly used in maps and data visualizations.

QGIS - Geographical Information System (GIS)

•    C++

QGIS is an Open Source Geographic Information System. QGIS aims to be an easy to use GIS, providing common functions and features. The initial goal was to provide a GIS data viewer. QGIS has reached that point in its evolution and is being used by many for their daily GIS data viewing and editing needs. QGIS supports a number of raster and vector data formats, with new support easily added using the plugin architecture.

Mapsforge - Vector map library written in Java - running on Android and Desktop.

•    Java

Mapsforge project uses a compact file format for fast ad-hoc rendering of OpenStreetMap data. It provides tools to compile your own maps with detailed instructions and also precompiled maps, Simple boilerplate code to build applications for Android that display OpenStreetMap-based maps. Mapsforge maps can be flexibly styled with XML style files (render themes).

songbird - Spatial Audio Encoding on the Web

•    Javascript

Spatial Audio Encoder in Web Audio API

leaflet - R Interface to Leaflet Maps

•    Javascript

Leaflet is an open-source JavaScript library for interactive maps. This R package makes it easy to create Leaflet maps from R. In addition to the usual R package documentation, we also have extensive docs and examples at: http://rstudio.github.io/leaflet You may use Github issues to file bug reports or feature requests, and ask questions on StackOverflow or in the Shiny mailing list.

Whitebox Geospatial Analysis Tools - An open-source GIS and remote sensing package

•    Java

Whitebox GAT is an open-source geographical information system (GIS) and remote sensing package. The Whitebox GAT project began in 2009 and was conceived as a replacement for the Terrain Analysis System (TAS). Whitebox GAT is intended to provide a platform for advanced geospatial data analysis with applications in both environmental research and the geomatics industry more broadly.

DotSpatial

DotSpatial is an open source project focused on developing a core set of GIS and mapping libraries that live together harmoniously in the DotSpatial namespace working seamlessly with the .NET framework.

spatial4j - A Geospatial Library for Java

•    Java

Spatial4j is a general purpose spatial / geospatial ASL licensed open-source Java library. It's core capabilities are 3-fold: to provide common geospatially-aware shapes, to provide distance calculations and other math, and to read shape formats like WKT and GeoJSON.

SpatiaLite - Spatial SQL

•    C

SpatiaLite is an open source library intended to extend the SQLite core to support fully fledged Spatial SQL capabilities. SQLite is intrinsically simple and lightweight, It is a single lightweight library implementing the full SQL engine. SpatiaLite is smoothly integrated into SQLite to provide a complete and powerful Spatial DBMS (mostly OGC-SFS compliant). Using SQLite + SpatiaLite you can effectively deploy an alternative open source Spatial DBMS roughly equivalent to PostgreSQL + PostGIS.

GeoCouch - A spatial index for CouchDB

•    Erlang

GeoCouch is a spatial extension for Couchbase and Apache CouchDB.This version of GeoCouch needs at least Apache CouchDB 1.3.x.

JCS - Conflates spatial datasets

•    Java

The JCS Conflation Suite is an API and set of interactive tools which perform conflation on spatial datasets.

Spatial Solr Plugin for Lucene and Solr

•    Java

With the continuous efforts of adjusting search results to focused target audieces, there's an increasing demand for incorporating geographical location information into the standard search functionality. Spatial Solr Plugin (SSP) is a free, standalone plug-in which enables Geo / Location Based Search, and is built on top of the open source projects Apache Solr and Apache Lucene.

Interdimensional - Spatial scrolling for your web pages.

•    Javascript

Spatial scrolling for your web pages.Only modern devices are supported. Developed on iOs 8.

sf - Simple Features for R

•    R

this will install binary packages on Windows and MacOS, unless you configured R such that it tries to install source packages; in that case, see below. Installing sf from source works under windows when Rtools is installed. This downloads the system requirements from rwinlib.

koop - :crystal_ball: Transform, query, and download geospatial data on the web.

•    Shell

Koop is a highly-extensible Javascript toolkit for connecting incompatible spatial APIs. Out of the box it exposes a Node.js server that can translate GeoJSON into the Geoservices specification supported by the ArcGIS family of products. Koop can be extended to translate data from any source to any API specification. Don't let API incompatiblity get in your way, start using one of Koop's data providers or write your own. Visit the demo at http://koop.dc.esri.com.

SAGA GIS - System for Automated Geoscientific Analyses

•    C++

SAGA is a free geographic information system (GIS), with a special 'Application Programming Interface' (API) for geographic data processing. This API makes it easy to implement new algorithms. The SAGA API supports grid data, vector data, and tables. It has been designed for an easy and effective implementation of spatial algorithms.

Bing Maps WPF Viewer

A helpful multi layer map viewer tool. Features (more soon) : * Tile layers XYZ format * MS SQL Server spatial layer

DotSpatialApp

DotSpatialApp is a UI wrapper around DotSpatial that includes a ribbon and docking panels. The functionality in this project will also be exposed as an extension package to MapWindow 6.

LinqToGeo - Language Integrated Query for Geospatial Data

•    LINQ

LinqToGeo provides language-integrated query to geospatial data.