since 1983, developing the free unix style operating system gnu, so that computer users can have the freedom to share and improve the software they use.

Red Hat is the world’s leading provider of open source solutions, using a community-powered approach to provide reliable and high-performing cloud, virtualization, storage, Linux, and middleware technologies. Red Hat also offers award-winning support, training, and consulting services. Red Hat is an S&P 500 company with more than 80 offices spanning the globe, empowering its customers’ businesses.

sourceforge provides free & fast open source software downloads and development, and business software reviews and comparisons featuring the largest open source and business software directory.

visualgdb is visual studio extension that adds c/c++ support for embedded, linux, and android platforms. it supports building, debugging and provides a powerful intellisense engine.

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Online GDB is online compiler and debugger for C/C++. You can compile, run and debug code with gdb online. Using gcc/g++ as compiler and gdb as debugger. Currently C and C++ languages are supported.