TupiTube 
The TupiTube or Tupi is a 2D animation software that focuses on teenagers, amateurs, and children. This project has been developed and maintained by startup called MaeFloresta Colombian. It is covered under the terms of GNU general public license version 2. It is an open-source software, thus is free of cost. 
 

Why you must get it: 
The most important goal is to provide an easy user experience. It has various features like support for basic tools for vector illustrations which include rectangle, lines, polygons and ellipses, etc. The paths can also be created with the help of a pencil or a pen tool. For filling the bounded areas of an object that are in vector, the user can use the paint bucket tool. The finished animations can be exported into different formats of the file which include MPEG, AVI SWF, and the image format into JPEG, SVG, and PNG.