Opus Creator is described as 'Create responsive HTML5, Flash and interactive multimedia without scripting. Opus Creator gets you productive today. Quickly design and distribute HTML5 websites, banners and other content, Windows apps, Flash animations and education resources. Free your creativity' and is an app in the Office & Productivity category. There are five alternatives to Opus Creator for Windows and Mac. The best alternative is Adobe Animate. It's not free, so if you're looking for a free alternative, you could try Hippani Animator or Express Animate. Other great apps like Opus Creator are Artist Code (Paid) and Aphalina Animator (Paid).
Artist Code is an intuitive software for creating animation ( Movie, Animated Gif, Images) only by coding, it allows you to add image, text and pixels and place them with simple script offering you a fun and unlimited way to create whatever you want.
Express Animate is free animation software that gives you the ability to animate shapes, text and imported images. You are also able to enhance your movie projects in post-production using key-frame motion animation, masking, dummy objects and more.