ATL .NET is a fully native, easy-to-use C# library for .NET and Mono that can read data from various digital audio formats, playlists and CUE Sheets.

The library allows reading (and writing) FLAC/OGG audio data as WAVE data stream.

ID3 Hunter is an application that uses the Last.FM and Gracenote databases to automatically detect ID3 tags for audio files. It also supports manual tag entry.

NTag is a portable JavaFX application for viewing and editing tags in audio files.

SmallTune is an audioplayer with a long tradition, being completely rewritten and redesigned by now.

A GUI for x264, ffmpeg, lame, faac, qaac, neroaacenc, oggenc, aften, lame, flac, mp4box and mkvtoolnix.

Implemented JFlacLib in C# A simple player to play flac in windows phone system

Luminescence.Xiph is a full managed assembly developped in C# for reading and writing Vorbis Comment tags (including picture), contained in Ogg and native FLAC.

Xiph Media Encoder is a wizard which help you to transcode automatically audio files in FLAC, Vorbis and Speex. It generates flexible PowerShell scripts.