Pablo - Pablo enables any user to create engaging images without sign-in and design experience.
Robolly - Auto‑personalize your open graph, social posts & more
Planable.io - Planable is the command center of social media campaigns trusted by agencies, freelancers, and marketing teams, that allows you to easily create, collaborate, get approval and schedule posts for your social media campaigns.
OG IMPACT - A free, open source API for generating social media images
Photler - Website creation & promotion tool. By travel photographer for travel photographers.
Social Image Generator - Automatically Generate Social Images For Your WordPress Site