Qt is a comprehensive, object-oriented development framework that enables development of high-performance, cross-platform rich-client and server-side applications. When you implement a program with Qt, you can run it on the X Window System (Unix/X11), Apple Mac OS X, and Microsoft Windows NT/9x/2000/XP by simply compiling the source code for the platform you want. Qt is the basis for the KDE desktop environment, and is also used in numerous commercial applications such as Google Earth, Skype for Linux, and Adobe Photoshop Elements.
pHash is an implementation of various perceptual hashing algorithms. A perceptual hash is a fingerprint of a multimedia file derived from various features from its content. Unlike cryptographic hash functions that rely on the avalanche effect of small changes in input leading to drastic changes in the output, perceptual hashes are "close" to one another if the features are similar. Potential applications include copyright protection, similarity searches for media files, or even digital forensics.
aime is a simple, C-like programming language and an interpreter, both designed to be embeddable in applications. The language is straightforward, trivial, and direct. Its syntax is simpler than that of C, while still providing for full object management, higher order functions, and references. The interpreter is secure and expressive, allowing comprehensive control over program execution and providing powerful methods of application integration.
db4o is an object database for Java and all .NET environments. Its features include ACID transactions, automatic class schema recognition, query-by-example, a S.O.D.A. object querying API, native queries, LINQ support on .NET, callback methods, memory files, cascade-on-delete, multi-threaded access, and Java Webstart and servlet support.
hamsterdb Embedded Storage is an embedded database engine written in ANSI-C. It includes B+Trees with variable length keys and records. It supports in-memory databases and endian-independent files, database cursors, multiple databases in one file, "record number" databases, and duplicate keys. hamsterdb is very fast and highly configurable. It compiles and runs on Unix platforms, Linux, Microsoft Windows, and Windows CE.
libferris is a virtual filesystem that exposes hierarchical data of all kinds through a common C++ interface. Access to data is performed using C++ IOStreams and metadata is available as key-value pairs through the Extended Attributes (EA) interface. Rich support for filesystem indexing is included to provide timely search results for well into millions of files. Ferris uses a plugin API to handle a large range of data sources, metadata, and index and search strategies. Filesystems include file:// with monitoring, XML (mount an XML file as a filesystem), relational databases, ISAM databases (Berkeley db, tdb, gdbm, eet et al), xmldb, LDAP, Applications (Evolution, Firefox, Emacs), HTTP, FTP, sockets, and RDF (from XML, binary, soprano). EA generators include image, audio, and animation decoders.
libx1f4l2 is a data structures library. Featured are self balancing BSTs and self balancing BST backed lists. The BST (binary search tree) selection includes AVL, red/black, AA, and RBST trees in simple, parent pointer, and threaded flavors. The BST backed lists are all-purpose lists, allowing for sequential and random access. The complexity for most operations is log(N), including reading, inserting, and deleting, random or sequential. Other library features include pointer sets and tries. A collection of demo, test, and data structure comparison programs is included.
OpenVRML is a VRML and X3D browser plug-in and C++ toolkit for incorporating VRML/X3D support into applications. It provides VRML97 and Classic VRML X3D parsers, a runtime, and an OpenGL renderer as C++ libraries. The renderer is fully separate from the runtime library so that users can also provide their own renderer. The OpenVRML browser is provided as a D-Bus service, and is embeddable in host applications using XEmbed. The distribution provides both a stand-alone host and a host that runs as a Mozilla plug-in.
GNU Mailutils is a rich and powerful protocol-independent mail framework. It contains a series of useful mail libraries, clients, and servers. These are the primary mail utilities for the GNU system. The central library is capable of handling electronic mail in various mailbox formats and protocols, both local and remote. Specifically, this project contains a POP3 server, an IMAP4 server, and a Sieve mail filter. It also provides a POSIX "mailx" client and a collection of other handy tools.