Calc is arbitrary precision arithmetic system that uses a C-like language. It's useful as a calculator, an algorithm prototype, and as a mathematical research tool. More importantly, calc provides a machine-independent means of computation. Calc comes with a rich set of builtin mathematical and programmatic functions.
BlueJ is an interactive Java development environment. It provides a unique user interface that presents a graphical display of the application classes and their relationships, and it lets users interactively create objects of any class. Once objects have been created, users can interact with them directly. This interaction mechanism allows for much greater testing and experimentation than in conventional environments. BlueJ is suited for teaching and learning OO and Java.
Aspose.Pdf is a .NET PDF component to write PDF documents without using Adobe Acrobat. It supports form field creation, document, text and page properties, color space, text, heading, and attachment settings. It lets you create PDF documents by using its API with XML templates and XSL-FO files. It also converts HTML, XSL-FO, and MS Word to PDF. Other features include image formats and security features, hyperlinks, the ability to add footnotes, automatic fitting to content in a table, decimal Tab stops, HTML tags, and keeping paragraphs together when breaking pages.
Topologic is a simple renderer for certain higher-dimensional geometric primitives and some regular 3D shapes. The idea is to make it easy for students of certain higher-dimensional maths and physics topics to visualize the typical primitives in those fields and get a grasp for the topic. Note: the program as such is freeware, while the part of it that deals with the Mathematics to project the geometric shapes to 3-space and 2-space has been released separately under an MIT/X style license.
Photo Organizer is a Web-based multi-user photo management tool that was designed for professional photographers. It offers a searchable photo database that supports photo version control, a datebook with client management, photo submission history, EXIF, IPTC, XML, and XMP, user quotas, and printing labels and color brochures. It uses ImageMagick and DCRAW to handle over a hundred image formats, and relies on PostgreSQL as its database backend.
WACS is a tool for building adult Web sites. It is equally suitable for managing a private collection or building a commercial site. WACS has many best of breed features, including dynamic filtering, model catalogs, random sampling, galleries, automatic download, and a powerful search engine. WACS contains both a full ready-to-run Web environment and an extensive programming API implemented in both Perl and PHP.