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Cxxtools is a collection of general-purpose C++ classes.

Darts: Double-ARray Trie System This is a C++ template library that implements Double-Array [Aoe 1989]. Currently only Japanese documentation is provided. * [Aoe1989] Aoe, J. An Efficient Digital Search Algorithm by Using a Double-Array Structure. IEEE Transactions on Software Engineering. Vol. 15, 9 (Sep 1989). pp. 1066-1077. * [Datrie] Theppitak Karoonboonyanan An Implementation of Double-Array Triehttp://www.links.nectec.or.th/~thep/datrie/

DataDraw is an ultra-fast persistent database for high performance programs written in C. It's so fast that many programs keep all their data in a DataDraw database, even while being manipulated in inner loops of compute intensive applications. Unlike slow SQL databases, DataDraw databases are compiled, and directly link into your C programs. DataDraw databases are resident in memory, making data manipulation even faster than if they were stored in native C data structures (really). Further, they can automatically support infinite undo/redo, greatly simplifying many applications. DataDraw databases can be persistent. Modifications to persistent data are written to disk as they are made, which of course dramatically slows write times. However, DataDraw databases can also be volatile. Volatile databases exist only in memory, and only for the duration that your program needs it. Volatile databases can be directly manipulated faster than C structures, since data is better organized in memory to optimize cache performance. DataDraw supports modular design. An application can have one or more common persistent databases, and multiple volatile databases to support various tools' data structures. Classes in a tool's database can extend classes in the common database. DataDraw is also 64-bit optimized, allowing programs to run much faster and in less memory than standard C programs using 64-bit pointers. This is because DataDraw databases support over 4 billion objects of a given class with 32-bit object references.

DCMTK is a collection of libraries and applications implementing large parts of the DICOM standard. DCMTK includes software for examining, constructing and converting DICOM image files, handling offline media, sending and receiving images over a network connection, as well as demonstrative image storage and worklist servers. DCMTK comes in complete source code and is written in a mixture of ANSI C and C++.

The libdisasm library provides basic disassembly of Intel x86 instructions from a binary stream. The intent is to provide an easy to use disassembler which can be called from any application; the disassembly can be produced in AT&T syntax and Intel syntax, as well as in an intermediate format which includes detailed instruction and operand type information.

DITrack is a free, open source, lightweight, distributed issue (bug, defect, ticket) tracking system using a Subversion repository instead of a backend database. It is written in Python and runs in UNIX environment (*BSD, Linux, MacOS X).

dot.conf is a simple configuration-file parser library written in C. The configuration files created for dot.conf look very similar to those used by the Apache Webserver. Even Container-Directives known from httpd.conf can easily be used in the exact same manner as for Apache-Modules. It supports various types of arguments, dynamically loadable modules that create their own configuration options on-the-fly, a here-documents feature to pass very long ARG_STR data to your app, ${NAME:-default} style environment variable substitution for arguments, and on-the-fly inclusion of additional config files. Some behaviour can be toggled with flags at runtime. To keep dotconf from printing out warnings, you can install your own customized error handler.

DParser is a simple but powerful tool for parsing. You can specify the form of the text to be parsed using a combination of regular expressions and grammar productions. Because of the parsing technique (technically a scannerless GLR parser based on the Tomita algorithm) there are no restrictions. The grammar can be ambiguous, right or left recursive, have any number of null productions, and because there is no separate tokenizer, can include whitespace in terminals and have terminals which are prefixes of other terminals. DParser handles not just well formed computer languages and data files, but just about any wacky situation that occurs in the real world.

Dynamic programming is a simple yet powerful technique for solving optimisation problems. When the problem at hand can be split in smaller problems, such that the smaller solutions of an optimal solution are themselves optimal, dynamic programming can be used to avoid re-calculating solutions to shared sub- problems. Simple problems are both easily specified and easily implemented, but for complex problems translating the specification of the problem into the implementation of the dynamic programming algorithm becomes tedious and error prone. The goal of DPROG is to alleviate this by automatically translating the specification of the problem into an implementation of the solution. The DPROG language is designed to be close to the ``mathematical'' notation used for expressing recurrences, thus making it easier to specify the problem. Using the DPROG compiler, the manual implementation step can be completely avoided.

Easy GIT is a single-file wrapper script for git, designed to make git easy to learn and use.