A high quality MP3 encoder
Multi-Format Audio-Encoder Front-end
winLAME is an easy to use encoder for many audio formats, e.g. MP3.
wxLame is a free front-end for the LAME MP3 encoder.
What's inside your mp3 files REALLY ?
Drag'n'Drop GUI for LAME MP3 compressor (and similar commandline ones)
Command-line mass conversion of any directory tree of audio files.
FFmpeg with HEVC (8/10 bit) and HE-AAC
Perl Script to Encode Sound Files
A tool for automated downmixing of live multitrack sound recordings
Text to Speech application with searching capabilities.
KDE4 GUI bash script to save youtube videos as mp3 files