Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Free MP3 Cutter - Free MP3 Cutter helps you slice off any unnecessary parts of an MP3 track you don't want.
Video DownloadHelper - Browser extension to download videos from the Web
MP3 Splitter & Joiner - MP3 Splitter & Joiner is a MP3 audio editor.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
MP3 Trimmer - With MP3 Trimmer - the most easy to use MP3 editor for Macintosh - you can edit MP3 files, join MP3...
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.