Boost is a set of libraries for the C++ programming language that provides support for tasks and structures such as linear algebra, pseudorandom number generation, multithreading, image processing, regular expressions, and unit testing. It contains 164 individual libraries (as of version 1.76).

All of the Boost libraries are licensed under the Boost Software License, designed to allow Boost to be used with both free and proprietary software projects. Many of Boost's founders are on the C++ standards committee, and several Boost libraries have been accepted for incorporation into the C++ Technical Report 1, the C++11 standard (e.g. smart pointers, thread, regex, random, ratio, tuple) and the C++17 standard (e.g. filesystem, any, optional, variant, string_view).

The Boost community emerged around 1998, when the first version of the standard was released. It has grown continuously since then and now plays a big role in the standardization of C++. Even though there is no formal relationship between the Boost community and the standardization committee, some of the developers are active in both groups.

Apache C++ Standard Library project (code name stdcxx) is a set of classes and functions, which are written in the core language.

Qt (pronounced "cute") is cross-platform software for creating graphical user interfaces as well as cross-platform applications that run on various software and hardware platforms such as Linux, Windows, macOS, Android or embedded systems with little or no change in the underlying codebase while still being a native application with native capabilities and speed.

Qt is currently being developed by The Qt Company, a publicly listed company, and the Qt Project under open-source governance, involving individual developers and organizations working to advance Qt. Qt is available under both commercial licenses and open-source GPL 2.0, GPL 3.0, and LGPL 3.0 licenses.

Asio is a freely available, open-source, cross-platform C++ library for network programming. It provides developers with a consistent asynchronous I/O model using a modern C++ approach. Boost.Asio was accepted into the Boost library on 30 December 2005 after a 20-day review. The library has been developed by Christopher M. Kohlhoff since 2003. A networking proposal based on Asio was submitted to the C++ standards committee in 2006 for possible inclusion in the second Technical Report on C++ Library Extensions (TR2).

The POrtable COmponents (POCO) C++ Libraries are computer software, a set of class libraries for developing computer network-centric, portable applications in the programming language C++. The libraries cover functions such as threads, thread synchronizing, file system access, streams, shared libraries and class loading, Internet sockets, and network communications protocols (HTTP, FTP, SMTP, etc.), and include an HTTP server, and an XML parser with SAX2 and DOM interfaces and SQL database access. The modular and efficient design and implementation makes the libraries well suited for embedded system development.
The libraries are free and open-source software distributed under the Boost Software License

Eigen is a high-level C++ library of template headers for linear algebra, matrix and vector operations, geometrical transformations, numerical solvers and related algorithms. Eigen is open-source software licensed under the Mozilla Public License 2.0 since version 3.1.1. Earlier versions were licensed under the GNU Lesser General Public License. Version 1.0 was released in Dec 2006.

Eigen is implemented using the expression templates metaprogramming technique, meaning it builds expression trees at compile time and generates custom code to evaluate these. Using expression templates and a cost model of floating point operations, the library performs its own loop unrolling and vectorization. Eigen itself can provide BLAS and a subset of LAPACK interfaces.

New Release 3.4 includes many improvements.

In software development, CMake is cross-platform free and open-source software for build automation, testing, packaging and installation of software by using a compiler-independent method. CMake is not a build system itself; it generates another system's build files. It supports directory hierarchies and applications that depend on multiple libraries. It is used in conjunction with native build environments such as Make, Qt Creator, Ninja, Android Studio, Apple's Xcode, and Microsoft Visual Studio. It has minimal dependencies, requiring only a C++ compiler on its own build system.

CMake is distributed as open-source software under a permissive BSD-3-Clause license.

Microsoft Visual C++ (MSVC) is a compiler for the C, C++ and C++/CX programming languages by Microsoft. MSVC is proprietary software; it was originally a standalone product but later became a part of Visual Studio and made available in both trialware and freeware forms. It features tools for developing and debugging C++ code, especially code written for the Windows API, DirectX and .NET.

Many applications require redistributable Visual C++ runtime library packages to function correctly. These packages are often installed independently of applications, allowing multiple applications to make use of the package while only having to install it once. These Visual C++ redistributable and runtime packages are mostly installed for standard libraries that many applications use.

JetBrains s.r.o. (formerly IntelliJ Software s.r.o.) is a Czech software development company which makes tools for software developers and project managers. As of 2022, the company has offices in Prague, Munich, Berlin, Boston, Massachusetts, Amsterdam, Foster City, California, Marlton, New Jersey, and Shanghai.

The company offers integrated development environments (IDEs) for the programming languages Java, Groovy, Kotlin, Ruby, Python, PHP, C, Objective-C, C++, C#, F#, Go, JavaScript, and the domain-specific language SQL. The company created the Kotlin programming language, which can run in a Java virtual machine (JVM), in 2011.

InfoWorld magazine awarded the firm "Technology of the Year Award" in 2011 and 2015.