Octopus
Octopus is an universal I/O and PWM expander shield. It’s a board in Fishino/Arduino’s shields format bringing 16 digital I/Os and 16 PWM outputs.
You can buy a Fishino Octopus board here
Technical specs
100 % compatible with Fishino and Arduino boards
16 Digital Inputs/Outputs
16 PWM outputs with 12 bit resolution
Can stack up to 8 boards
Supplied with an easy to use software library
Works over I2C interface
Electronic schematics and Eagle files