Do you want to contribute to an open-source project and get a t-shirt in the process?
Throughout October you have the opportunity to get a free t-shirt if you make 5 pull requests on an open-source project on github, e.g. one of digIT's ;)
To register, go to https://hacktoberfest.digitalocean.com/
If you want to participate but don't know what you want to do or have some other question, come by one of digIT's workshops on Tuesdays in Hubben :)