Virtual Audio Cable - Ever wanted to record your speaker output? (loopback) This is for you.
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
Loopback by RogueAmoeba - Get all the power of a high-end studio mixing board, right inside your Mac!
streamWriter - streamWriter records music broadcasted by internet-radiostations. Features:
JACK Audio Connection Kit - JACK Audio Connection Kit|Home
Downie - Video download for OS X. Downie supports at this moment over 1,000 different sites.