Frame Sticker for iOS & Android

Animated Gif Maker

How to add GIF files to videos - Microsoft Support

GIF Maker - Convert Video to GIF::Appstore for Android

GifCam (Delay, Add Text and UI)

animation - Video/Animated GIF advanced frame editor? - Super User

PicMix gif Photo Frames, Frame, cadre , animated , Frame , Caree , Glitter…

Anniversary Photo Frame Editor - Apps on Google Play

c# - Gif File Specification - Comment property of frames - Stack Overflow

Animation Basics -- ImageMagick Examples

AE Fundamentals: Render a GIF