Основные:
Имеет схожий с µTorrent интерфейс
Интегрированный и расширяемый поисковый функционал
DHT, Peer Exchange, Полное шифрование, Magnet ссылки
Удаленный контроль (Web-интерфейс)
Практически идентичный основному интерфейсу, базирующийся на Ajax
Расширенный контроль трекеров, пиров и торрентов
Очереди торрентов и приоритезация
Очереди и приоритезация файлов торрента
Поддержка UPnP / NAT-PMP port forwarding
Переведен на ~25 языков (поддержка Unicode)
Расширенная поддержка RSS с фильтрами закачек
Планировщик скоростей
IP-Filter (совместимый с eMule и PeerGuardian)
Совместимный с IPv6

Ключевые:
Возможность создания торрентов.
Наличие интегрированной и расширяемой за счет плагинов поисковой системы.
Одновременный поиск на наиболее известных поисковых сайтах BitTorrent.
Поддержка всех BitTorrent расширений.
Поддержка DHT, Peer Exchange, Full encryption, Magnet/BitComet URIs.
Удаленное управление через веб-интерфейс.
Наличие опции последовательной закачки, позволяющей смотреть фильм еще до того, как он полностью скачался.
Расширенный контроль над трекерами, пирами и торрентами.
Управление приоритетом и очередью закачки.
Выбор содержимого торрентов.
Поддержка UPnP/NAT-PMP.
Расширенная поддержка RSS с фильтрами для загрузки.
Встроенный планировщик.
Менеджер ограничения скорости.
IP фильтрация.
Поддержка IPv6.
Поддержка Unicode.

qBittorrent v3.3.5 was released.

FEATURE: Implement Torrent Management Mode(TMM) (glassez)
FEATURE: New cookies management dialog and various related fixes (glassez)
FEATURE: Use unique temp directories (temp_path/<truncated_torrent_hash>). Closes #5154. (glassez)
FEATURE: Display notifications when a torrent is added. Closes #334 and #915. (sledgehammer999)
FEATURE: Sort labels with natural sort algorithm in the right-click menu. Closes #3919. (Chocobo1)
FEATURE: Add option to automatically remove .torrent files upon adding (Eugene Shalygin)
FEATURE: Add option to bind directly to an IP instead of using a network Interface (Sjoerd van der Berg, sledgehammer999)
FEATURE: Detailed tooltips on the progress and availability bars in the General button of each torrent. (Eugene Shalygin)
FEATURE: Let user able to specifiy a filter when choosing an IP filter file (Chocobo1)
FEATURE: Improve usability of "Run External Program". Users can write (platform dependent) shell scripts now. (Chocobo1)
PERFORMANCE: Optimize drawing in speed graph (Anton Lashkov, Chocobo1)
BUGFIX: Fix memory leak. (sledgehammer999)
BUGFIX: Fix resizing bug in "add torrent dialog". Closes #5036. (Chocobo1)
BUGFIX: Fix qBittorrent doesn't exit immediately when "all donwloads are done -> exit" option enabled. (glassez, Chocobo1)
BUGFIX: Display the filepath when a torrent fails to load. Closes #100 and #805. (sledgehammer999)
BUGFIX: Fix Add tracker dialog empty trackers (ngosang)
BUGFIX: Fix Add tracker dialog URL download (ngosang)
BUGFIX: Fix torrent adding with existing data (glassez)
BUGFIX: Try to find incomplete files for new torrent (glassez)
BUGFIX: Fix rechecking after torrent is finished (glassez)
BUGFIX: Fix duplicate network interfaces. Closes #5131 (ngosang)
BUGFIX: Fix .!qB extension is added when disabled (glassez)
BUGFIX: Fix "IP Filtering - Apply to trackers" wasn't being applied. Closes #5217. (Chocobo1)
BUGFIX: Don't resize the Country column needlessly (thalieht)
BUGFIX: Fix crashing when exiting the program while the Options window was showing. Closes #4871, #5049. (Chocobo1)
BUGFIX: Fix parsing of eMule .DAT filters. Closes #5281. (thalieht, sledgehammer999)
WEBUI: Implement in setting/removing/showing categories. (buinsky)
WEBUI: Add 'Added on' column in Webui. Closes #5145,#1092,#738 (Ibrahim Tachijian)
WEBUI: Add command to get the logs (pmzqla)
WEBUI: Expose Add trackers feature (pmzqla)
WEBUI: Bump API_VERSION and API_VERSION_MIN to 10. (sledgehammer999)
SEARCH: Implement search filters in the proxy model. (Eugene Shalygin)
SEARCH: Optimize widgets inside of the search tab (Eugene Shalygin)
SEARCH: Remove duplicated code from search tab and widget (Eugene Shalygin)
SEARCH: Use nova2dl.py script instead of DownloadManager. Closes #5026. (glassez)
SEARCH: Various UI cleanups and optimizations. (Chocobo1, ngosang)
SEARCH: Fix Torrentz, Mininova, LegitTorrents, PirateBay plugins (ngosang)
SEARCH: Fix toolbar resizing when m_searchFilter appears/disappears. Closes #5120. (Chocobo1)
SEARCH: Use QPalette::LinkVisited color for downloaded items in search results (Eugene Shalygin)
SEARCH: Update Python version requirements (min 2.7.9 / 3.3.0) (ngosang)
SEARCH: Remove filters from Torrentreactor, BTDigg and Demonoid. It is done in the GUI now. (ngosang)
RSS: default refresh interval to 30 mins (botmtl)
COSMETIC: Improve TransferListDelegate::sizeHint (Chocobo1)
COSMETIC: Fix long text clipping. Closes #5091. (Chocobo1)
COSMETIC: Minor change in Stats dialog (ngosang)
COSMETIC: Fix Update all button height in RSS tab (ngosang)
COSMETIC: Disable `comboHideZero` when `checkHideZero` is unchecked. (Chocobo1)
COSMETIC: Disable `checkLimituTPConnections` when `checkuTP` is unchecked. (Chocobo1)
COSMETIC: Enable word wrap for "Run external program" help text (Chocobo1)
COSMETIC: Fix mutually exclusive radio buttons can be unselected. (Chocobo1)
COSMETIC: Set About tab font-size to default (zywo)
COSMETIC: Improve wordings in "Auto download torrent" section (Chocobo1)
COSMETIC: Change "Auto download torrent" default save path to "default location". (Chocobo1)
COSMETIC: Change ambiguous text "Copy selected" to "Copy IP:port" (Chocobo1)
COSMETIC: Improve error messages for "Auto download torrents" (Chocobo1)
COSMETIC: Slim down 'Downloads' page of options window. (sledgehammer999)
COSMETIC: Cleanup Connection page in Option dialog. Closes #845. (Chocobo1)
COSMETIC: Fix reload button size is not the same size as "..." button in options dialog. (Chocobo1)
WINDOWS: Let Windows handle all widgets scaling. (Chocobo1)
WINDOWS: Improve stack trace for windows by including source filenames and line numbers (SeigneurSerpent)
OSX: Fix qt5 bundle on OSX. Closes #4014. (sledgehammer999)
OTHER: Make AddNewTorrentDialog behavior uniform (glassez)
OTHER: Optimize the shutdown dialog (Chocobo1)
OTHER: Enable access to shutdown functions when configured with `--disable-gui` option (Chocobo1)
OTHER: Delete Import Torrent Dialog. Just use the "add new torrent" dialog. (glassez)
OTHER: Optimize code for natural sorting (Chocobo1)
OTHER: Use new alert dispathing API for libtorrent 1.1.x (glassez)
OTHER: Fix gcc 6 compilation with qmake. See #5237. (sledgehammer999)