FLAC - A free, open source codec for lossless audio compression and decompression
LameXP - LameXP is an Audio Encoder Front-End, a graphical user-interface for a number of audio encoders.
Opus Interactive Audio Codec - Opus is a totally open, royalty-free, highly versatile audio codec.
LameDropXPd - LameDropXPd is a practical frontend for LAME that makes things easier to the user, as there is no...
Vorbis - Ogg Vorbis is a fully open, general-purpose compressed audio format for mid to high quality...
wxLame - wxLame is a free front-end for the LAME MP3 encoder.