PickStackr - Organize and manage your camera roll
Glitterly - The video editor for making short video clips of your apps
Carousel - Carousel is the best way to experience Instagram on your Mac.
InVideo.io - Create thumb-stopping videos in mins for just $10/month even if you've never edited a video before!
Gemini Photos - Clean up your Camera Roll
Coub - Coub is an app that features GIFs, but the GIFs that you select and send to other people have sounds.