GRASS (the Geographic Resources Analysis Support System) is a software raster- and vector-based GIS (Geographic Information System), image processing system, graphics production system, and spatial modeling system. It contains many modules for raster data manipulation, vector data manipulation, rendering images on the monitor or paper, multispectral image geocoding and processing, point data management and general data management. It also has tools for interfacing with digitizers, scanners, and the PostgreSQL, DBF, and ODBC connected databases. GRASS operates on all common operating systems.
The Chemistry Development Kit (CDK) is a library of Java classes for chemo-, bioinformatics, computational chemistry, and chemometrics. It provides important algorithms like substructure search, SMILES, Gasteiger charges, QSAR descriptor calculation, 3D structure generation, 2D layout and rendering, many IO formats, atom typing, and more.
Entrance is a program for browsing MySQL databases. It includes a "match box" search facility that is simlar to the Mac's Spotlight. Entrance can create charts based on query results, and these charts can be zoomed and panned. Entrance also supports an innovative feature called "data painting" that allows users to select and paint data points interactively.
imgSeek is a photo collection manager capable of searching through an image database, in which the query is expressed either as a rough sketch painted by the user or as another image you supply. You simply draw a rough sketch of what you want to find and imgSeek displays for you a thumbnail view of the best matches. You may also find duplicate images automatically, generate Web photo albums, edit image metadata including EXIF JPEG data, organize images into a keyword hierarchy, and more.
photos is a Web-based photo database for storing metadata about digital photos so you can find them again later. It supports adding photos one at a time, or as a group by directory. It is intended to be run locally but can be run on a remote Web server if you've got the space and the bandwidth.