Center for Spatial Geospatial at UCR is the home to several open-source packages:

Package Version Functionality Platform Language Documentation
PySAL 1.14.3 PySAL is an open source library of spatial analysis functions written in Python intended to support the development of high level applications. Cross-platform (Win, OSX and Linux) & open source under BSD License Python 2.7 & 3.4 & 3.5 Documentation website Download
PySAL-1.14.3.tar.gz
Giddy 1.1.1 Giddy is an open-source python library for the analysis of dynamics of longitudinal spatial data. It is under active development for the inclusion of many newly proposed analytics that consider the role of space in the evolution of distributions over time. Cross-platform (Win, OSX and Linux) & open source under BSD License Python 3.5 & 3.6 Documentation website Download
giddy-1.1.1.tar.gz
Kite beta-1 Kite is an open-source & scalable microblogs data management system. It is implemented as a distributed system on top of Apache Ignite system and Hadoop Distributed File System (HDFS). Cross-platform (Win, OSX and Linux) & open source under Apache License 2.0 Java Documentation website Download
Kite-beta-1

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