Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
FLAC - A free, open source codec for lossless audio compression and decompression
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
WavPack - WavPack is a completely open audio compression format providing lossless, high-quality lossy, and a...
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
LameXP - LameXP is an Audio Encoder Front-End, a graphical user-interface for a number of audio encoders.