The top 5 best software for 2D animation are Toon Boom Harmony, Adobe Animate, Moho Pro, Synfig Studio, and Pencil2D. Toon Boom Harmony is the industry-leading software for 2D animation, used by ...

Pencil is a very realistic sketching program and good 2D animation tool for the cost (free).

Alternatively, other 2D animation packages to consider would be Krita or Synfig Studio - one of our 11 recommended tools for artists looking to get into animation.