BitComet(比特彗星)是一個完全免費的BitTorrent(BT)下載管理軟體，也稱BT下載用戶端，同時也是一個集BT/HTTP/FTP為一體的下載管理器。BitComet(比特彗星)擁有多項領先的BT下載技術，有邊下載邊播放的獨有技術，也有方便自然的使用介面。最新版又將BT技術應用到了普通的HTTP/FTP下載，可以通過BT技術加速您的普通下載。
BitComet(比特彗星) 的特點
• BT下載 - 高速而且功能強大
o 從P2SP下載: 創新的跨協議下載，BT任務可以從P2SP的種子下載，從而提高下載速度.(0.86新功能)
o 種子市場: 用戶可以共用任務列表，也可以流覽下載其他人共用的任務.(0.86新功能)
o 邊下載邊播放: 在下載 MP3, rmvb, wmv等視頻檔過程中可以邊下載邊播放.
o 智慧連接優化: 自動根據您的網路連接優化下載.
o 智慧磁片緩存: 使用記憶體作下載緩存, 有效減小硬碟讀寫速度, 延長其使用壽命.
o 智慧檔掃描: 續傳作種均無需再次掃描檔.
o 智慧磁片分配: 有效減少磁片碎片產生。
o 內網互聯: 突破閘道，自動實現不同內網間的互聯傳輸。
o 支援通過公用DHT網路，實現無TrackerTorrent檔下載。（詳細資訊）
o 自動防火牆配置，全自動配置XP網路連接防火牆(ICF)和網路連接共用(ICS)。
o 自動配置路由器埠映射，採用UPnP技術實現內網免配置（要求路由器支援UPnP，作業系統XP）。
o 相容Windows XP SP2的TCP/IP限制，並對tcpip.sys補丁有調整選項。
o 支援多Tracker協定，UTF-8擴展，UDP Tracker v2協定。
• HTTP/FTP下載 - 創新的P2P技術
o 邊下載邊播放: 在下載 MP3, rmvb, wmv等視頻檔過程中可以邊下載邊播放.
o 中斷點續傳: 安全可靠的中斷點續傳技術，保證下載檔的完整性。
o 多線程下載: 檔被分成多點同時從伺服器下載，提高下載速度。
o 多鏡像下載: 自動尋找檔鏡像，同時從多個伺服器下載，提高下載速度。
o P2P下載: 將BT的P2P技術與HTTP/FTP融合，自動尋找其他下載用戶進行P2P下載，即不增加伺服器負擔，又能提高下載速度。
o 多語言支援: 能正確處理多語言作業系統多語言網頁，多語言路徑編碼過的網址。
• 任務管理
o 可以限制全局和單任務的上傳下載速度
o 時段限速
o 用戶可自定義分類
• 方便易用而且免費!
o 完全免費並且不包含任何間諜軟體或第三方軟體(用戶可選的Google工具條除外)
o 使用非常容易簡單，我們盡力使所有複雜的技術細節自動優化，而不勞煩用戶來研究。
BitComet Client Release Notes
v0.90 2007.06.19
GUI Improved: add search for eDonkey download source option in BT task properties dialog
GUI Improved: add ED download plugin configuration page in perferences dialog
GUI Improved: display download rate from HTTP/FTP sources and ED sources in BT task summary pane
GUI Improved: shotsnap info for each item in task list and torrent share list changed to a clickable icon
GUI Improved: tasks remain selected after sort task list
GUI Improved: new context menu for my shared torrent and peer shared torrent in fav list
GUI Improved: decrease CPU usage for shared torrent list refresh
GUI Improved: new search icon for each item in shared torrent list
GUI Improved: prompt infomation will be displayed when shared torrent list is empty
GUI Improved: add "copy BC link" to context menu of shared torrent list, with hotkey Ctrl+C
GUI Improved: add "clear all" to context menu of peer shared torrent list
GUI Improved: new option in View menu to show search box in toolbar
GUI Improved: shutdown computer after download finish works for HTTP task now
GUI Improved: text in info bar and status bar of review window change to multi-language string
GUI Improved: the last task will be selected when BitComet startup
GUI Improved: minimize to system tray by close button or minimize button can be configured in preferences dialog
GUI Improved: a prompt window will popup if BitComet detected that the TCP half-open limit of windows is too small at startup
GUI Improved: new state of "detecting" for WAN/LAN ip detector in status bar
GUI Improved: HTTP task connection list move to the up of task log
GUI Improved: the auto-start order for queued task keeps the same to display order of sorted task list
GUI Bugfix: preview window fail to refresh when swtich UI language
GUI Bugfix: "pause all active task" in context menu of floating window does not work
GUI Bugfix: program exit confirm when task running do not count up uploading tasks
GUI Bugfix: unable to click task comment, snapshot and voting for items of 10001th and below in shared torrent list
GUI Bugfix: redownload HTTP task will lose task list sort order
Core Improved: BT task support downloading from eDonkey network (ED plugin for BitComet is required)
Core Improved: BT task support uploading to eDonkey network
Core Improved: add eDonkey network listen port to Windows Firewall and UPNP NAT device when program startup
Core Improved: disable NAT Traversal via UDP automatically for WAN IP user, to improve TCP transfer efficiency
Core Bugfix: auto stop running BT task using a invalid condition dismatch to user settings
Core Bugfix: program will lose respond for a while to flush disk cache when downloading huge HTTP/FTP file under Win2003 64bit
