Alternatives to BitSpirit for all platforms with any license

Transmission

Transmission has the features you expect in a BitTorrent client: encryption, a web-based interface, peer exchange, UPnP and NAT-PMP port forwarding, web seed support...

Free Open Source Mac Windows Linux BSD PortableApps.com ... Haiku Xfce
Command Line support File-sync Lightweight Portable ... Remote desktop Remote Management Add a feature

1304 Like
µTorrent

µTorrent is an ad-supported, proprietary BitTorrent client owned and developed by BitTorrent, Inc.

Freemium Mac Windows Linux Android PortableApps.com ... Wine
Anonymity Lightweight Peer-To-Peer Portable ... Shutdown after completing Option Add a feature

2590 Like
Deluge

Deluge is a full-featured BitTorrent client for Linux, Unix and Windows. It is written in python, uses libtorrent (rasterbar) at its...

Free Open Source Mac Windows Linux BSD libtorrent ... Python
Ad-free Ad-free Built-in Torrent client Extensible by Plugins/Extensions ... Portable Add a feature

626 Like
Tixati

Tixati is a peer-to-peer file sharing program that uses the popular BitTorrent protocol. This protocol allows many peers to form a cooperative swarm and download very...

Free Personal Windows Linux
Customizable Decentralized Group chat Media Streaming ... Peer-To-Peer Portable Remote Management Torrent search Stream audio Sync iTunes Libraries Tag based Add a feature

187 Like
RetroShare

RetroShare is a open source cross-platform, private and secure decentralized communication system. It lets you to securely chat, share photos, videos, and more, using...

Free Open Source Mac Windows Linux BSD OpenSSL ... OpenPGP
Serverless Anonymous Secure Filesharing Decentralized End-to-end encryption ... Gpg encryption Add a feature

97 Like
Vuze

Vuze is a free BitTorrent client used to transfer files via the BitTorrent protocol.

Freemium Mac Windows Linux Android BSD ... Chrome
Built-in Antivirus Built-in player Built-in Video Converter Integrated Chat ... Integrated Search Add a feature

262 Like
- Bundleware Be careful during the installation: https://alternativeto.net/discussions/applications/11718/be-careful-in-the-installation/
FilePizza

Open source application used to transfer file via WebRTC and WebTorrent. Open the website, select a file and get given a link to send to the recipient. For as long as...

Free Open Source Web Self-Hosted
Peer-To-Peer Secure File Sharing Add a feature

46 Like
BitTorrent

BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc. used for uploading and downloading files via the BitTorrent protocol. BitTorrent was...

Freemium Mac Windows Android Android Tablet
Built-in Antivirus Built-in Media converter Built-in player Peer-To-Peer ... Remote desktop Add a feature

118 Like
rTorrent

rtorrent is a BitTorrent client for ncurses, using the libtorrent library. The client and library is written in C++ with emphasis on speed and efficiency, while...

Free Open Source Mac Linux BSD
Command Line support Add a feature

82 Like
PicoTorrent

PicoTorrent is designed to be a tiny, easy-to-use BitTorrent client with low memory usage.

Free Open Source Windows
Lightweight Support for MAGNET links Portable Add a feature

44 Like
Miro

Miro (formerly Democracy Player) is a free and open source internet TV application, media library, and video player. Through Miro, you can subscribe to any RSS feed...

Free Open Source Mac Windows Linux BSD
Android Sync Built-in Media converter Built-in Torrent client Create PlayList ... Fullscreen support Music Library Music store Add a feature

238 Like
- Discontinued No updates since 2013. Youtube intergration broken because of no updates since youtube API changed. See changelog: http://ftp.osuosl.org/pub/pculture.org/Miro/
Tribler

Tribler is an application that enables its users to find, enjoy and share content. With content we mean video, audio, pictures, and much more. Tribler has three goals in...

Free Open Source Mac Windows Linux
Decentralized Distributed Integrated File Sharing Integrated Search ... Peer-To-Peer Add a feature

60 Like
- Warning Host's IP can be used as exit nodes: it means that if some other user downloads something illegal, you could be prosecuted because your IP appears! Even on Tribler official website, a Disclaimer states: "Do not put yourself in danger. Our anonymity is not yet mature. Tribler does not protect you against spooks and government agencies."
FrostWire

Easy to use BitTorrent Client and YouTube Downloader in one, with built-in search and music library.

Free Open Source Mac Windows Linux Android Android Tablet ... Kindle Fire
Built-in player Integrated Search iTunes integration Media Streaming ... Peer-To-Peer Torrent search Large File Transfer Download from Soundcloud Add a feature

122 Like
- Discontinued In September 2018 after the Android app was removed from the Play Store by Google, the team has decided to close the FrostWire project: https://frostwire.wordpress.com/2018/09/27/frostwire-for-android-is-no-longer-available-on-google-play/ Last version, 6.7.4, released on September 26, 2018, can be still downloaded from GitHub.
- Bundleware As reported on VirusTotal, the installer contains Opencandy. Be careful during installation. https://www.virustotal.com/en/file/60a309e91ba1039c3527053867e0e210ff2e18628a01acc264d82430e6436889/analysis/
BiglyBT

BiglyBT is a feature filled, open source, bittorrent client based on the Azureus open source project, now Vuze . Features: ...

Free Open Source Mac Windows Linux Android BSD
i2P integration Swarm Merging Ad-free Built-in Media converter ... Built-in player Support for DLNA Integrated Chat Meta-Search Support for TOR Support for WebTorrent Add a feature

25 Like
Halite

Halite (named after the mineral) is a C++ BitTorrent client based on the excellent libtorrent library from Rasterbar Software. The program also relies heavily on the...

Free Open Source Windows libtorrent
No features added Add a feature

41 Like
- Discontinued Last version was released on 19/12/2015, as of 2017 app is still stable and working.