Ghidra is a free and open-source software reverse engineering tool developed by the National Security Agency (NSA). It allows users to analyze binary files and understand their structure and functionality. Ghidra supports various programming languages and architectures, making it versatile for security researchers, software developers, and hobbyists. The tool features a user-friendly interface and powerful analysis capabilities, including decompilation, disassembly, and debugging. Ghidra also supports collaborative work, enabling multiple users to analyze the same project simultaneously. Its extensive documentation and active community contribute to its growing popularity in the field of cybersecurity and software analysis.