Yes, BitTorrent automatically enters endgame mode when the pieces remaining are all being actively downloaded. During endgame mode, BitTorrent requests each remaining piece from multiple peers instead of requesting each piece from a single peer. This mode helps make getting the last pieces of the torrent contents take much less time than it normally would.
Yes, BitTorrent supports Unicode.
Yes, BitTorrent supports HTTPS (SSL) for both trackers and RSS feeds. UDP trackers are supported as well.
Yes, BitTorrent can use and create magnet URIs compatible with the Azureus magnet URI implementation. BitTorrent can generate magnet URIs for any torrent job, and magnet URIs can be opened from the Add Torrent from URL dialog. Metadata regarding the torrent contents are obtained from other peers that support the feature.
Yes, BitTorrent supports multi-scrape and uses it when bt.multiscrape is enabled. It automatically detects trackers that do not support multi-scrape and falls back to single-scrape mode for those trackers.
Yes, BitTorrent supports multi-tracker .torrent files. BitTorrent announces to all tracker tiers simultaneously, but only one tracker per tier. To see all the trackers in the .torernt file, simply check the torrent job's Properties. To learn more about multi-tracker specification, check the multitracker specifications at Depthstrike.com's wiki.
Yes, BitTorrent supports trackerless .torrent files. The built-in .torrent file creator can also create trackerless .torrent files.
Yes, BitTorrent supports UNC-style paths (like \192.168.1.2\C$\). Note that there may be increased disk fragmentation when saving to a network drive, since pre-allocation of files is not possible across the network.