Robolly - Auto‑personalize your open graph, social posts & more
Placid - Use Placid to auto-generate images, videos & PDFs from reusable templates
OG IMPACT - A free, open source API for generating social media images
OGimage.gallery - Carefully collected OG images gallery
Social Image Generator - Automatically Generate Social Images For Your WordPress Site
Gauguin - Generate dynamic OpenGraph or social images in real-time