This star wars papercraft is designed by piro. Slave I was a modified prototype Firespray-31-class patrol and attack craft used by famed bounty hunters Jango Fett and his cloned "son", Boba Fett. It was greatly modified with advanced weapons systems by both Fetts during their respective use.
Originating from Oovo IV, the ship was stolen by Jango Fett, replacing his previous ship, Jaster's Legacy. After Jango's death on Geonosis in 22 BBY, the ship was inherited by Boba Fett and used on several missions during and after the Clone Wars. It was subsequently replaced by the Slave II, Slave III, and Slave IV. You can download this paper model from here: Star Wars - Slave I Free Papercraft Download