Watermark.ink - Online Photo Watermarker
Instagram Caption Writer - Write nice formatted Instagram captions.
textmark - Protect your content with an invisible, trackable watermark.
CaptionBot by Microsoft - Analyzing and describing images by a bot
AG Audio Watermark Generator - AG Audio Watermark generator is a little app for both mac and pc that will help you to add an audio watermark to your original track in a fast & easy.
Drake Captions - Find the perfect Drake lyric for your Instagram caption