OpenNLP is an open-source software library designed for natural language processing (NLP) tasks. It provides tools for various functions such as tokenization, part-of-speech tagging, named entity recognition, and parsing. These features help developers analyze and understand human language in a structured way. The library is built in Java and supports multiple languages, making it versatile for different applications. OpenNLP is widely used in academic research and industry projects to enhance machine learning models and improve user interactions with software through better language understanding.