SocialSizes - Sketch templates for sharing images & videos on social media
GIMP Online - Powerful graphics editor in the cloud
Startup Booster - Startup Booster is a pack of 27 stylish creatives for social media.
chaosMachine - One-click unique graphics generator
Instagram Story Templates by Kapwing - Create simple, beautiful Instagram Stories from templates
Asteroid Video - Create high-resolution videos in just a few taps