Over the weekend, Valve made the Dota 2 Spectator Client available to all Steam users. Now you can watch live and recent matches, not to mention all the nail-biting action from the upcoming tournament, "The International." All spectator features are enabled, including Player Perspective, Commentators, and Directed View.
The International will be happening between August 31 and September 2 in Seattle, Washington, right there next to PAX Prime. Since most of us on the planet won't be able to personally attend, spectating is the next best thing. The tournament will span three days of double-elimination bracket gameplay, leading up to Sunday's Grand Finals.
You can download the client here.