CONV. - Convert YouTube video to MP3, GIF or MP4
OwlOCR - OwlOCR offers simple optical character recognition of text in PDF files, images or on-screen and converts that to plain text.
YouTubeDLD - World's most efficient YouTube downloader. No spam or ads.
You-Get - Command-line utility to download media contents from the web
FFmpeg - Open source multimedia suite for conversion, playback, profiling, and streaming.
Yout - YouTube to Mp3 Converter