The best alternatives to Social Share Kit are Placid, awsm.css, and Dragula. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Dynamically generate link preview images for Facebook & Twitter! Choose from our preset designs and create your og:images & twitter:images via our API. Just fill elements like text, photos or website screenshots dynamically.