In again! Tools I might use:

• jgame.js (https://github.com/borisvanschooten/jgame.js)
• tinyspriteeditor (http://tmtg.nl/tinyspriteeditor/) (https://github.com/borisvanschooten/tinyspriteeditor)
• animated character generator (http://tmtg.nl/ludumdare/ld53-charactergen/)
• gimp
• audacity
• jsfxr (https://sfxr.me/)
• LMMS (if I get round to music)
• Pytorch or tensorflow.js - in case I include AI like last time

A little plug for my animated character generator: here are some sprites generated with it.