The qBittorrent project - 21.9MB - Бесплатно (Open-Source)
The qBittorrent project aims to provide a Free Software alternative to µtorrent. Additionally, qBittorrent runs and provides the same features on all major platforms (Linux, Mac OS X, Windows, OS/2, FreeBSD).

qBittorrent Features

Polished µTorrent-like User Interface
Well-integrated and extensible Search Engine
        Simultaneous search in most famous BitTorrent search sites
        Per-category-specific search requests (e.g. Books, Music, Movies)
All Bittorrent extensions
        DHT, Peer Exchange, Full encryption, Magnet/BitComet URIs, ...
Remote control through a Web user interface
        Nearly identical to the regular UI, all in Ajax
Advanced control over trackers, peers and torrents
        Torrents queueing and prioritizing
        Torrent content selection and prioritizing
UPnP / NAT-PMP port forwarding support
Available in ~41 languages (Unicode support)
Torrent creation tool
Advanced RSS support with download filters (inc. regex)
Bandwidth scheduler
IP Filtering (eMule and PeerGuardian compatible)
IPv6 compliant
Sequential downloading (aka "Download in order")
Available on most platforms: Linux, Mac OS X, Windows, OS/2, FreeBSD

Ares - 5.67 MB - Бесплатно (Open-Source)
Ares is a free open source file sharing program that enables users to share any digital file including images, audio, video, software, documents, etc. You may now easily publish your files through the Ares peer to peer network. As a member of the virtual community, you can search and download just about any file shared by other users. Latest versions support BitTorrent protocol and Shoutcast radio stations. With Ares you can also join chat rooms or host your channel and meet new friends.

Ludvig Strigeus - 2.8MB - Бесплатно (Freeware)

Среди всех программ, использующих протокол bit torrent, µTorrent пользуется, пожалуй, наибольшей популярностью. Небольшой размер установочного дистрибутива и малое место, занимаемое программой на жестком диске. разумный минимализм, предельная доступность и функциональность интерфейса позволяют использовать программу широкому кругу пользователей пиринговых p2p-сетей.

BitTorrent, Inc - 2.9MB - Бесплатно (Freeware)

BitTorrent Free -очень маленький, но крайне удобный и быстрый торрент клиент. Высокая скорость загрузки, даже очень больших файлов достигается путем разбиения всего файла на маленькие части и использования параллельной загрузки.

Google - 48.8MB - Бесплатно (Freeware)
Google Drive—a place where you can create, share, collaborate, and keep all of your stuff. Whether you’re working with a friend on a joint research project, planning a wedding with your fiancé or tracking a budget with roommates, you can do it in Drive. You can upload and access all of your files, including videos, photos, Google Docs, PDFs and beyond. 

Key Features:

  • Create and collaborate.
    Google Docs is built right into Google Drive, so you can work with others in real time on documents, spreadsheets and presentations. Once you choose to share content with others, you can add and reply to comments on anything (PDF, image, video file, etc.) and receive notifications when other people comment on shared items.

  • Store everything safely and access it anywhere (especially while on the go).
    You can access your stuff from anywhere—on the web, in your home, at the office, while running errands and from all of your devices.  

  • Search everything.
    Search by keyword and filter by file type, owner and more. Drive can even recognize text in scanned documents using Optical Character Recognition (OCR) technology.

Dropbox - 83.3MB - Бесплатно (Freeware)
Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Dropbox was founded in 2007 by Drew Houston and Arash Ferdowsi, two MIT students tired of emailing files to themselves to work from more than one computer.