Features

streams audio, video (SD & HD) and image files in their native format or transcoded in real-time
streams content from online sources, like RSS feeds, live audio/video streams, web page content
includes a plugin system to support streaming from non-trivial online sources
supports most known playlist formats
supports subtitles
automatically updates the media library when you add/update/remove a media file or a metadata file
supports RAW camera images
wide array of localized library browsing options
supports different editable renderer profiles
supports automatic renderer detection and per-IP profile assignment
extracts metadata of your media files the way you want it, incl. embedded metadata tags, local metadata files, online metadata sources (in preferred language), XBMC, Swisscenter, MyMovies
supports video thumbnails, CD covers, DVD posters, etc.
categorizes video files into movie and/or series and marks last viewed episodes of a series
integrates with trakt.tv
Alexa skill available
available for Windows, Linux, Mac and several NAS platforms

Supported renderers

Audio: MP3( .mp3), MP2 (.mp2), Windows Media Audio (.wma), WMA Lossless (.wma), AAC (.m4a, .m4b), OGG (.ogg, .oga), FLAC (.flac), Apple Lossless ALAC (.mp4), Wawpack (.wv), Musepack (.mpc), Monkey's Audio (.ape), DSF (.dsf), WAV (.wav),
Video: MPEG-1 (.mpg, .mpeg), MPEG-2 PS (.mpg, .mpeg, vob, mod), MPEG-2 TS (.ts, .m2ts), MPEG-4 (.mp4, m4v, mov), AVI (.avi, .divx), Windows Media Video (.wmv, .asf), Matroska (.mkv), Flash (.flv, .f4v), DVR-MS (.dvr, .dvr-ms), WTV (.wtv), OGG (.ogv, .ogm), 3GP (.3gp, .3g2), RealVideo (.rm, .rmvb), WebM (.webm)
Image: JPEG (.jpg, .jpeg), GIF (.gif), PNG (.png), RAW (.arw, .cr2, .crw, .dng, .raf, .raw,. rw2, .mrw, .nef, .nrw, .pef, .srf, .orf)
Playlist: PLS (.pls), M3U (.m3u, .m3u8), ASX (.asx, .wax., .wrx), WPL (.wpl)
Subtitles: SubRip (.srt, .txt), SSA/ASS (.ssa, .ass), MicroDVD (.sub, .txt), SAMI (.smi), VTT (.vtt), MOV open text