Check your Hacktoberfest 2017 progress here. It is a fan made chrome extension and is not affiliated to hacktoberfest officially.
Hacktoberfest is open to everyone. Pull requests can be made in any GitHub-hosted repositories/projects. You can sign up anytime between October 1 and October 31. Check your Hacktoberfest 2018 progress here. It is a fan made chrome extension and is not affiliated to Hacktoberfest officially.