Enve is a new open-source 2D animation software for Linux and Windows. You can use enve to create vector animations, raster animations, and even use sound and video files. Enve was created with flexibility and expandability in mind. (GPL)
Linux - Windows
Glaxnimate is a simple and fast vector graphics animation program. It features a customizable interface, smooth animations, supports animation for the web (gif, Webp) and is cross platform. (GPL)
Cross-platform
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 (GPL)
Linux - Windows - macOS
Storyboarder makes it easy to visualize a story as fast you can draw stick figures. Quickly draw to test if a story idea works. Create and show animatics to others. Express your story idea without making a movie. (MIT)
Linux - Windows - macOS
Synfig is a powerful, industrial-strength vector-based 2D animation software package, designed from the ground-up for producing feature-film quality animation with fewer people and resources. (GPL)
Linux - FreeBSD - Windows - macOS
5 applications