Pepyatka is an open source FriendFeed clone. Basically, this is a social real-time feed aggregator that allows you to share cute kitty photos, coordinate upcoming events, discuss any other cool stuff on the Internet or setup a private Pepyatka instance in your company.
Tasks: https://github.com/pepyatka/pepyatka/issues
Old and unmaintained: https://trello.com/b/uvRkkOTH
You can drop a question here or there.
Pepyatka itself is licensed under the MIT License.