TorrentAid offers a suite of tools (although only one currently) that intend to extend the capabilities of .torrent files needed to download or upload on BitTorrent. All of the additions to the functionality of .torrents are tested and ensured to be backward-compatible to BitTorrent programs that don't plan to support or have support for the added features. This allows a person to seamlessly create .torrents using the Torrent Wizard so there only needs to be one .torrent distributed. There's nothing hampering other clients from utilizing the .torrents created.
TorrentAid supports an extended version of the .torrent file that (while compatible), also stores SHA1s for each file. This means that applicationss like Shareaza can then use the SHA1 hash and other hash data to search for more sources on other P2P networks. This is especially useful for files on BitTorrent that don't receive as much popularity as others, and sources on other P2P networks can give a great boost in speeds.
<!-- Torrent Wizard is a very light-weight .torrent maker that uses C++ rather than Python, boasting a slim 90 KB installer. TorrentAid offers all of the features traditional torrent creator programs, such as maketorrent and completedir, offer but more!
Did we mention it's Open Source?
<!-- The only client that currently supports TorrentAid's tracker bandwidth reducing is Shareaza. It is an easy-to-use client that supports BitTorrent, Gnutella2, Gnutella (may have pop-ups), and eDonkey. It is a highly recommended client for BitTorrent distribution.