This is by far one of my favorite things. I have been using it for a couple of years now. No long ago I realized how accustomed I had become to it that just the though of using my old manual timer disappointed me.
You can see how many people are meditating with you (live) worldwide.
You can open an account (optional) and chat with them.
They also have the option to keep a journal.
The first time I got it, I wrote the company to ask them about how to add a song (mantra) to it, and to my surprise I got a response the day after. How cool is that, eh?
Here it is. Enjoy it!