This website enables you to draw your own sprites
A pc is required to use Piskelapp
You can also make animated gifs with your sprites, as well as upload and edit your own pics.
This site is easy to use and is good for making sprites to use in the latest version of Hopscotch
You can also download the offline version to use on a pc or mac
This is the download link for Windows.
This is the download link for Mac
This is a simple animated sprite bomb gif I made with Piskelapp