GeoServer is a software server that allows users to share and edit geospatial data. Designed for interoperability, it publishes data from any major spatial data source using open standards. GeoServer is the reference implementation of the Open Geospatial Consortium (OGC) Web Feature Service (WFS) and Web Coverage Service (WCS) standards, as well as a high performance certified compliant Web Map Service (WMS). GeoServer forms a core component of the Geospatial Web.
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.
ComicMaster is a CBR/CBZ reader for comic archives. It is able to open CBR and CBZ archives and display image contents. It allows you to add and remove single images, reorder images, and rename images in archives. It has some functionality to verify archives, and provides means to conveniently sort archives in a different folder. Those features are fairly well tested. It allows you to load a database plugin to manage comics in a PostgreSQL database, and it allows you to add meta-information in XML format to archives. The implementation of these features is currently sketchy at best.
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.
Alexandria is a GNOME application to help manage a book collection. It retrieves book information (including cover pictures) from several online libraries, allows you to search for a book (either by EAN/ISBN, title, authors, or keyword), can import and export data into ONIX, Tellico, and EAN/ISBN-list formats, generates Web pages from your libraries, allows marking your books as loaned, saves data using the YAML format, features an HIG-compliant user interface, shows books in different views that can be filtered or sorted, and handles book rating and notes.
oo.WebsiteTools is a set of basic tools which are needed on almost every Web site. Using these tools speeds up your Web development radically. It consists of three different parts: oo.Admin, oo.Sql, and oo.Ajax. oo.Admin is used to administer the site and allow users to manage their accounts. oo.Sql lets you change database backends without changing your SQL code. oo.Ajax is an AJAX library that can load and update div elements, send forms without reloading the page, and more.