digiKam - Professional Photo Management with the Power of Open Source
Antiselfie club - Take a photo and get a antiselfie.
Photos on macOS - Photos keeps your images organized and accessible. Rediscover favorite shots with Memories. Access them on your devices with iCloud Photos.
Dango - Use emoji, stickers & gifs faster ๐ ๐ฌ
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
MessMoji - Emoji stickers for iMessages