GitHub repository: kudini/Polish-Train-Set-3.0
Description: NewGRF with Polish trains for OpenTTD. Initially started by TadeuszD as PKP Set 2.0 in 2011, forked by Mewa as Polish Train Set 3.0 in 2021, fixed by Brickblock1 to work with OpenTTD 13 in 2023, and finally forked by qamil to continue work forked by Kudi