OG IMPACT - A free, open source API for generating social media images
Grade My Ads - Score your Facebook ads + improve them, in seconds.
Landscape by Sprout Social - An interactive tool for social media image resizing
upRive - Create and scale Facebook ads quickly and efficiently
Social Share Preview - Check social media link previews while you browse
AdHawk - AdHawk aggregates a company's total digital marketing data, and offers advertisers one-click optimization solutions.