Image Rotator - Rotate Image Online for Free in 1 Click
Zeplin - Collaboration app for UI designers & frontend developers
Source Compare - Soure Compare allows your team to remain in sync by being a central place that your entire team can keep track of all your images for a particular project.
Handoff by Marvel - Automatically turn designs into assets, specs and code
File Upload Widget API - Ready to impress file picker & cloud uploader for your web apps with Built-in photo editor.
InVision Studio - The world’s most powerful screen design tool