Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
AudioMass - A full-featured web based audio editor 🎶
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
GoldWave - GoldWave. Digital Audio Editing Software. Record • Restore • Convert • Analyze. Fully loaded to do everything from the simplest recording and editing to the most sophisticated audio processing, restoration, enhancements, analysis, and conversions.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Wavosaur - WAVOSAUR is a free audio editor for Windows with VST plugins support. The program is ASIO compatible, can do loop points edition, auto-trim, noise removal.