The Eclipse CDT™ Project provides a fully functional C and C++ Integrated Development Environment based on the Eclipse platform. Features include: support for project creation and managed build for various toolchains, standard make build, source navigation, various source knowledge tools, such as type hierarchy, call graph, include browser, macro definition browser, code editor with syntax highlighting, folding and hyperlink navigation, source code refactoring and code generation, visual debugging tools, including memory, registers, and disassembly viewers.
See also https://projects.eclipse.org/projects/tools.cdt and https://eclipse.org/cdt
The Eclipse CDT project is split into multiple Git repositories, which are all part of this organization. If you face an issue and have a sense of which particular GitHub repository is most related, you can open your issue against that repository. If you're unsure, you can open an issue against this current repositories and the issue will then be moved as best by maintainers.
Contributions are always welcome!
Please bear in mind that this project is almost entirely developed by volunteers. If you do not provide the implementation yourself (or pay someone to do it for you), the bug might never get fixed. If it is a serious bug, other people than you might care enough to provide a fix.