MP3 Joiner Pro - join MP3,merge audio files to one
MP3 Joiner,MP3 Merger - join MP3,merge MP3 files to one
Free Merge MP3 Download: An easy to use application that enables you to merge or combine several audio files into a single one, or convert them to other formats
How to Combine Multiple MP3 File into One - Audacity
GitHub - alexemanuelol/merge_mp3: Merges specified mp3 files into a single file or if no mp3 files are specified, merges all mp3 files in the current directory