Resizing.app - Image resizing has never been so simple with free online resizing.app. Convert, optimize, resize images with ease and for absolutely free.
Social Templates Bundle for Instagram - Large bundle of 240 posts & stories templates for Instagram
Image Resizer for Windows - Lets you resize images by right-clicking.
SocialSizes - Sketch templates for sharing images & videos on social media
punchi.me - Edit one or several images in a few clics.
Polarr 2.0a - An online photo editor (big data meets Lightroom)