BiglyBT is a feature-filled, open-source, ad-free bittorrent client. Forked from the Azureus open-source project created in 2003, BiglyBT continues its development, and keeps all the features you've loved. If you are already using Azureus or Vuze, you'll have the option to copy and migrate the config settings, downloads, and plugins.
Updated on Feb 25 2022
Full changelog available here.