Zendesk is a cloud-based customer service and engagement platform designed for businesses. It provides tools for ticketing, self-service options, and customer support analytics.
Doxygen is a documentation generator tool that can be used to generate documentation in various formats (HTML, LaTeX, RTF, etc.) from source code comments using special syntax. It supports multiple programming languages including C++, Python, Java and more, and can also be integrated with other tools such as Graphviz for creating diagrams.