Shareaza is a free, Windows-based file-sharing software that enables users to download and upload media files via four popular peer-to-peer (P2P) networks- eMule, Gnutella, BitTorrent, and Gnutella2. The software is free of spyware and third-party products.

What's even better news is that Shareaza is completely free of charge and does not show any ads or pop-ups, no third-party software, no spyware, no registration, and there is no "paid version" at all. Shareaza is open source, providing users with immense freedom in using the software.
The software boasts phenomenal multi-network support. Shareaza can connect to up to four separate P2P networks, providing access to hundreds of thousands of diverse users, which is all possible through one single program. Shareaza offers users the opportunity to download/upload files from EDonkey2000, Gnutella, BitTorrent, and Gnutella2 (G2).
In addition, Shareaza enables fast downloads by allowing downloads from multiple sources. Its sophisticated file-hashing technology helps detect and fix corruption before the download is complete, so there's no more need to deal with corrupted files and mp3s that skip.
Its multiple results tabs allow each search to be displayed in a new window, so search results are never overwritten. Shareaza runs desired searches, enhancing user experience. Users can also get previews, users' comments, and ratings of search results, providing better insights into the content they are about to download.
Furthermore, Shareaza is multilingual, with translation into over 10 different languages, which makes it equipped with full Unicode support for true international searches and downloads. Shareaza also has a media player that plays all types of video and audio files. Users can even edit playlists, watch visualisations, and control the player with a snazzy remote. Its preview filters ensures the previewing of incomplete audio and video files.
And that's not all; Shareaza has a chat option where users can chat with their friends one-on-one while they're using the software, pass on messages, or get to know another Shareaza user. Security is a high priority for Shareaza, and with the help of security block lists, a highly-sophisticated IP, and client filter, users will have the ability to block malicious companies, clients, and undesirable content.
In conclusion, Shareaza is an incredibly sophisticated software that has everything a user could need for effective and secure file sharing.
Version 2.7.10.2: A long awaited release accumulated a 3rd party libraries security fixes, minor bug-fixes and some BitTorrent improvements.