Android-Bootanimation-Optimizer is a project mainly written in ..., it's free.
Bash script that optimizes .png images to reduce size using pngnq
Bash script that optimizes a user selectable number of .png images in the form boot_xxxxx.png to reduce size using pngnq.
REQUIREMENTS pngnq PNG images in the form boot_xxxxx.png (for example boot_00001.png through to boot_00057.png) - must have 5 digits!
USE