Synfig is a free and open-source, industrial-strength, vector-based 2D animation app designed for producing feature-film animations. It eliminates the need to create animations frame by frame. It is available for Windows, Linux, and macOS.
Enve is a free and open-source 2D animation app. It can create both vector and raster animations and even use sound and video files. It has been created with flexibility and expandability in mind.
Pencil2D is an opensource animation/drawing software for Mac OS X, Windows, and Linux, based on old Pencil software. It lets you create traditional hand-drawn animation (cartoon) using both bitmap and vector graphics.
Adobe Animate, previously Adobe Flash Professional, is an authoring environment (IDE) that can produce interactive solutions for running inside web browsers or for the desktop.
Animation Desk is a perfect tool for animating, storyboarding, and sketching. It’s an app Loved by professional and amateur animators, Youtubers, and many art lovers. Draw you frame-to-frame animation from scratch, or create animations upon videos, images, PSD layers.
Pencil is an animation/drawing software for Mac OS X, Windows, and Linux. It lets you create traditional hand-drawn animation (cartoon) using both bitmap and vector graphics.
Updated project here: Pencil2D
Create beautiful 2D motion graphics and vector animations for any platform in matter of minutes.