Fenetre App - Picture in picture for your mac.
CONV. - Convert YouTube video to MP3, GIF or MP4
Polarr Photo Editor 3 - The most powerful photo editor in the web.
Softorino YouTube Converter - Download YouTube video & audio. Watch and listen offline
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Yout - YouTube to Mp3 Converter