saves programmers hours or days of work on quick-turnaround screen scraping projects

ERDAS Imagine is a suite of geospatial authoring software. The suite contains a raster graphics editor and remote sensing application that performs advanced remote sensing analysis and spatial modelling to create new information. ERDAS IMAGINE can also visualize results in 2D, 3D, movies, and on cartographic quality map compositions.
Features:
• Image Analysis, Remote Sensing & GIS
• Parallel Batch Processing
• Spatial Modeling
• High Performance Mosaicking Engine in IMAGINE Advantage

Graphviz is open source software for graph visualization, representing structural information as diagrams of abstract graphs and networks. The package includes web and interactive graphical interfaces, and auxiliary tools, libraries, and language bindings.

Modest Maps is a display and interaction library for tile-based maps in Flash and Python that can display maps from external sources (e.g. OpenStreetMap, NASA Blue Marble, Yahoo!, Microsoft, but not Google Maps

The National Language Toolkit (NLTK) is a set of open source Python modules, linguistic data and documentation for research and development in natural language processing and text analytics.

PDFMiner is a Python tool for extracting information from PDFs (not only text, but also information about fonts, encoding, and layout.)

PostgreSQL is a powerful, open source object-relational database system running on all major platforms. Support for native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl and ODBC among others.
Features:

Solr is an open source enterprise search platform from the Apache Lucene project. It operates as a standalone full-text search server within an appropriate servlet container, such as Tomcat. Solr uses the Lucene Java search library at its core for full-text indexing and search, and has REST-like HTTP/XML and JSON APIs that make it easy to use from virtually any programming language.