Ono is a simple plugin for popular Bittorrent client Azureus to accelerate speeds upto 207% on average, according to the project developer team at Northwestern University’s AquaLab group:

For most P2P applications, the decision regarding which peer to download from is generally arbitrary. When most peers offer good download performance, the random solution works well. However, if most peers are in a different part of the world from you, your downloads can really suffer.

The Ono plugin avoids this by proactively finding peers that are close to you (in a networking sense). These peers generally offer better response time, which can lead to significantly improved performance. We identify those peers that are near you by reusing network measurements from content distribution networks (CDNs), i.e. without performing extensive path measurement or probing.

So does this work? In a word, yes. Using results collected from our participating users (well over 100,000 of them!), we have found that our system locates peers along paths that have two orders of magnitude lower latency and 30% lower loss rates than those picked at random by BitTorrent, and that these high-quality paths can lead to significant improvements in transfer rates. In challenged settings where peers are overloaded in terms of available bandwidth, Ono provides a 31% average download-rate improvement; in environments with large available bandwidth, Ono increases download rates by 207% on average (and improves median rates by 883%).