Delta assists you in minimizing "interesting" files subject to a test of their interestingness. A common such situation is when attempting to isolate a small failure-inducing substring of a large input that causes your program to exhibit a bug.

Remake is an enhanced version of GNU Make that adds improved error reporting, better tracing, profiling, and a debugger.

Fandango is a generator of inputs and interactions for software testing. Given the specification of a program's input or interaction language, Fandango generates myriads of valid sample inputs for testing. The specification language combines a grammar with constraints written in Python. Minimization or maximization soft constraints and input distributions can also be expressed in Fandango.

Stress Make is a customized GNU Make that explicitly manages the order in which concurrent jobs are run to provoke erroneous behavior into becoming manifest. It can run jobs in the order in which they're launched, in backwards order, or in random order. The thought is that if code builds correctly with Stress Make, then it is likely that the Makefile contains no race conditions.

The libbacktrace library can be linked into a C/C++ program to produce symbolic backtraces.

Decker is a multimedia platform for creating and sharing interactive documents, with sound, images, hypertext, and scripted behavior.

DejaGnu is a framework for testing software. In effect, it serves as a front-end for all tests written for a program. Thus, each program can have multiple test suites, which are then all managed by a single harness.

SCMackerel is a library in GNU Guile to create abstract syntax trees (ASTs). Initially written for mCRL2 and now also supporting other languages, such as C, C++, and C#. Based on GNU Guix records.

Dezyne is a programming language and a set of tools to specify, validate, verify, simulate, document, and implement concurrent control software for embedded and cyber-physical systems. The Dezyne language has formal semantics expressed in mCRL2.

Dhall is an explicitly typed configuration language that is not Turing complete. Despite being Turing incomplete, Dhall is a real programming language with a type-checker and evaluator.

Use this library to parse, type-check, evaluate, and pretty-print the Dhall configuration language. This package also includes an executable which type-checks a Dhall file and reduces the file to a fully evaluated normal form.

Dpic is an implementation of the pic "little language" for creating line drawings and illustrations for documents, web pages, and other uses.

Pikchr (pronounced picture) is a PIC-like markup language for diagrams in technical documentation. Pikchr is designed to be embedded in fenced code blocks of Markdown or similar mechanisms of other documentation markup languages.

Ding is a dictionary lookup program for the X window system. It comes with a German-English dictionary with approximately 270,000 entries.

Lttoolbox is a toolbox for lexical processing, morphological analysis and generation of words. Analysis is the process of splitting a word (e.g. cats) into its lemma "cat" and the grammatical information <n><pl>. Generation is the opposite process.

FreeDict is a project that offers over 140 free dictionaries in about 45 languages, with the right to study, change and modify them. You can use them offline on your computer or mobile phone and export them to any format and application.

In order to limit store size and build complexity, only the build targets that build dictionaries in dictd format are retained when this Guix package is installed.

Translate Shell (formerly Google Translate CLI) is a command-line translator powered by Google Translate (default), Bing Translator, Yandex.Translate and Apertium. It gives you easy access to one of these translation engines from your terminal.

GNU Dico implements a flexible dictionary server and client according to RFC 2229 (DICT Server). It is able to access any database available, regardless of format, thanks to its modular structure. New modules may be written in C, Guile or Python. Dico also includes a command-line client, which may be used to query remote dictionary databases.

GCIDE is a free dictionary based on a combination of sources. It can be used via the GNU Dico program or accessed online at http://gcide.gnu.org.ua/

sdcv is simple text-based utility for work with dictionaries in StarDict's format.

The Jargon File is a comprehensive compendium of hacker slang, originating in the early days of computing history. This package puts the Jargon File in a format compatible with dicod and similar programs.

The libmaa library provides many low-level data structures which are helpful for writing compilers, including hash tables, sets, lists, debugging support, and memory management. Although libmaa was designed and implemented as a foundation for the Khepara transformation system, the data structures are generally applicable to a wide range of programming problems.

The memory management routines are especially helpful for improving the performance of memory-intensive applications.

The DICT Interchange Format (DICF) is a human-readable format for the interchange of dictionary databases for the use with DICT protocol client/server software.

This package provides a client dict and a server program dictd for the DICT protocol, as well as a utility dictfmt to convert various dictionary formats into dictionaries that can be served by dictd or Dico.

V.E.R.A. (Virtual Entity of Relevant Acronyms) is a list of computing acronyms distributed as an info document.

CMUdict (the Carnegie Mellon Pronouncing Dictionary) is a free pronouncing dictionary of English, suitable for uses in speech technology and is maintained by the Speech Group in the School of Computer Science at Carnegie Mellon University.