veadotube mini is a lightweight, easy-to-use PNGtuber app. It is a simple program that lets you switch between two images easily.
You can add two additional frames for eye-blinking and let your character jump and/or shake when they talk. You can add different expressions for your character and alternate between them using hotkeys. GIFs and animated PNGs are supported along with the usual static PNGs and other image formats.