FrostWire is a free, open-source peer-to-peer (P2P) file-sharing client that allows users to download and share files over the internet. It supports various file types, including audio, video, and documents. FrostWire also has a built-in media player, search engine, and chat rooms, making it a versatile tool for downloading and sharing files. Additionally, it offers a simple and user-friendly interface that allows easy navigation and customization.