qBitTorrent is a free, open-source, and cross-platform BitTorrent client that allows users to download and share files using the BitTorrent protocol. It features a user-friendly interface, an integrated search engine, sequential downloading, and support for various BitTorrent features like UPnP/NAT-PMP, IP filtering, and RSS feeds. qBittorrent is designed to be fast, stable, and lightweight, offering a secure and ad-free alternative to other torrent clients, such as µTorrent.