There are various software available (commercial as well as open source/freeware) for processing Geospatial data. Here is the alphabetical list of open source software related to Geoscience and Remote Sensing.
Approximate Nearest Neighbors (ANN) is a library written in the C++ programming language to support both exact and approximate nearest neighbor searching in spaces of various dimensions.
The MapReady Remote Sensing Tool Kit accepts level 1 detected SAR data, single look complex SAR data, and optical data from ASF and some other facilities. It can terrain correct, geocode, apply polarimetric decompositions to multi-pol SAR data, and save to several common imagery formats including GeoTIFF. Other software included in the package are an image viewer, metadata viewer, a projection coordinate converter, and a variety of command line tools.
ASF SAR Training Processor
The SAR Training Processor (STP) is a graphical tool written to assist in learning and teaching the flow of SAR processing.
BEAM is a toolbox for viewing, analyzing and processing of remote sensing data.
Matlab Collection by Beril Sirmacek
This collection includes matlab codes for active shape growing 2D box fit, intensity value based box fit, shadow detection, and color invariant features for Object (Road) Detection.
A package of programs for the determination of canopy geometry and solar radiation regimes through hemispherical photographs.
Monitoring tropical deforestation and forest degradation with satellites can be an everyday activity for non-experts who support environmental conservation, forest management, and resource policy development. Through extensive observation of user needs, we developed CLASlite to assist governments, nongovernmental organizations, and academic institutions with high-resolution mapping and monitoring of forests with satellite imagery.
Climate Resilience Toolkit
Tools are available to help you manage your climate-related risks and opportunities, and to help guide you in building resilience to extreme events.
3D point cloud and mesh processing software.
and many more. Please download the complete list from here