A server plugin for orangebox's games that displays your server score when requested.
Customize the steam notifications' position on a per game basis easily.
This project provides a various set of headers that allows to use the steamworks and internal steam features in your app.
I'm not the owner of that project, but one of its developers.
A clientside plugin for Day of Defeat : Source that makes records automatically.
See the email associated with your steam account (it bypasses steamguard).