Canva pretty much cover it all. With an extensive library of templates for different social media elements, including cover photos, posts, and even advertisements, Canva helps you design according to your individual preferences and come away with a comprehensive result.
Recite has a very specific task and it delivers perfect results. The site functions to make beautiful quotes from the text you input. Practically effortless to use, Recite just asks you to input your text and pick your favourite template.
Another site claiming fast turnover, Pablo by Buffer promises beautiful results for your social media needs in less than 30 seconds. The site is slowly allowing for direct sharing, but still requires going through Buffer for sharing to most of your social media networks.