Subtitles Downloader by Checksub - Sometimes you may want to export or edit the subtitling of Youtube videos that you have uploaded or that you're fans of.
Kamua - Automate video resizing, cut-downs & captions for social
Universal Word - Translate YouTube subtitles into multiple languages
Node Video - Most powerful video editing app ever
YouTube Transcripts - Turbocharged SEO with cheap, fast & accurate transcripts
Quik by GoPro - Easiest way to create awesome videos