Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Mimi.io - Clear music and sound customized by your hearing profile
Video DownloadHelper - Browser extension to download videos from the Web
Hermes - Pandora Client for OS X
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Pandora Thumbprint Radio - A hyper-personalized station based on the songs you've liked
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.