Pencil2D

You can use Pencil2D software to make animation drawings. The software in which you will make drawings using vector and bitmap graphics is open source, easy to use.

There is also the possibility of drawing animation manually in the software, where you can prepare simple 2D graphics and drawings as well as 2D animations. Unlike Flash, Pencil2D is a multi-platform software supported by Windows, Mac, Linux and FreeBSD, where you need to draw every frame manually. This small-sized software works without exhausting system resources.