Opus opus-codec.org

A totally open, royalty-free, highly versatile audio codec. [BSD]

OneCompiler onecompiler.com

An online compiler supporting over 70 programming languages and database systems.

ODE ode.org

Open Dynamics Engine - An open source, high performance library for simulating rigid body dynamics. [BSD&LGPL]

OCLint oclint.org

A static source code analysis tool to improve quality and reduce defects for C, C++ and Objective-C. - source

MuPDF mupdf.com

A lightweight PDF, XPS, and E-book viewer. [AGPL/Proprietary]

Nettle lysator.liu.se

A low-level cryptographic library. [LGPL]

Allegro liballeg.org

A cross-platform library mainly aimed for video games and multimedia programming. [zlib]

American fuzzy lop lcamtuf.coredump.cx

a.k.a. afl-fuzz - Crazy fuzzing tool that automatically discovers bugs given time and minimal example input. [Apache2]

OpenCL khronos.org

The open standard for parallel programming of heterogeneous systems.

KFR kfrlib.com

Fast, modern C++ DSP framework, FFT, FIR/IIR filters, Sample Rate Conversion. [GPL/Proprietary]

Kaitai Struct kaitai.io

A declarative language to describe various binary data structures and a compiler to generate C++ parser code. [GPLv3+][MIT][Apache2]

Irrlicht irrlicht.sourceforge.net

A high performance realtime 3D engine written in C++. [zlib]

Inqlude inqlude.org

The Qt library archive.

Google C++ Style Guide google.github.io

GnuTLS gnutls.org

A secure communications library implementing the SSL, TLS and DTLS protocols. [LGPL2.1]

GnuPG gnupg.org

A complete and free implementation of the OpenPGP standard. [GPL]

GDB gnu.org

GNU Debugger.

Qt github.com

zap: - A cross-platform application and UI framework. [GPL/LGPL/Proprietary] website

Boost github.com

zap: - A large collection of generic C++ libraries. [Boost] website

Geany geany.org

Small, fast, cross-platform IDE. [GPL]

GCC gcc.gnu.org

GNU Compiler Collection. Supports C++11/14/1z C11 and OpenMP. [GNU GPL3]

FOX Toolkit fox-toolkit.org

an open-source, cross-platform widget toolkit. [LGPL]

FFTW fftw.org

A C library for computing the DFT in one or more dimensions. [GPL]

Deleaker deleaker.com

A tool for resource leak detection, including memory, GDI and handle leaks.

CppDepend cppdepend.com

Simplifies managing a complex C/C++ code base by analyzing and visualizing code dependencies, by defining design rules, by doing impact analysis, and comparing different versions of the code.

CMake cmake.org

Cross-platform free and open-source software for managing the build process of software using a compiler-independent method. [BSD]

ceres-solver ceres-solver.org

C++ library for modeling and solving large complicated nonlinear least squares problems from google. [BSD]

Cairo cairographics.org

A 2D graphics library with support for multiple output devices. [LGPL2 or Mozilla MPL]

Botan botan.randombit.net

A crypto library for C++. [BSD-2]

blaze bitbucket.org

high-performance C++ math library for dense and sparse arithmetic. [BSD]

Bcrypt bcrypt.sourceforge.net

A cross platform file encryption utility. Encrypted files are portable across all supported operating systems and processors. [BSD]

AngelScript angelcode.com

AngelScript is a game-oriented interpreted/compiled scripting language. [zlib]

SNMP++ agentpp.com

a C++ API which supports SNMP v1/2c/v3. [custom permissive license]

AGENT++ agentpp.com

C++ framework provides a complete tri-lingual SNMP v1/2c/3 protocol engine and dispatcher for the development of SNMP agents. [Apache-2.0]

Craft GraphQL APIs in Elixir with Absinthe pragprog.com

Upgrade your web API to GraphQL, leveraging its flexible queries to empower your users, and its declarative structure to simplify your code (2017).

free PO editor pofile.net

A tool for translating PO files.

Elixir Radar plataformatec.com.br

The "official" Elixir newsletter, published weekly via email by Plataformatec.

Discover Elixir & Phoenix ludu.co

An online course that teaches both the Elixir language and the Phoenix framework.

LearnElixir.tv learnelixir.tv

Beginner friendly, in-depth, step by step screencasts.

Erlang and Elixir for Imperative Programmers leanpub.com

Introduction to Erlang and Elixir in the context of functional concepts by Wolfgang Loder (2016).

Hex hex.pm

A package manager for the Erlang ecosystem.

Erlang in Anger erlang-in-anger.com

This book intends to be a little guide about how to be the Erlang medic in a time of war by Fred Hebert (2014).

Elixir Sips elixirsips.com

Tiny screencasts for learning Elixir.

ElixirSlack elixir-slackin.herokuapp.com

Elixir Slack Community.

Elixir for Programmers codestool.coding-gnome.com

Functional, Parallel, Reliable (and fun!), taught by Dave Thomas.

@sindresorhus github.com

, AVA, awesome

Elm Weekly elmweekly.nl

ClojureScript for Skeptics youtube.com

Derek Slager's talk for Clojure Conj 2015 where he is Discussing the many reasons why ClojureScript is in fact a very pragmatic language to consider for web development.

Parinfer (multiple editors) shaunlebron.github.io

Overtone overtone.github.io