LogMeIn join.me for iPhone

Join.me is a free and easy-to-use screen-sharing tool that allows you to create instant online meetings and presentations of up to 250 people, with the absolute minimum of hassle.

The process starts when you download and run the join.me application. There's no installer, no complex options to worry about - it just pops up a toolbar at the top of your screen, and displays a multi-digit code, like "801-625-337".

Now all you have to do is get that code to everyone you'd like at the meeting: email is fine. Then your recipients must go to https://join.me, type your code into the "join" box, click the green button - and that's it, they'll be connected to your join.me session. (As long as they have Flash Player 10, and are running Internet Explorer 6, 7, 8, Firefox 3, Chrome 5 or Safari 5, anyway.)

Everyone who joins can see your screen, so you can immediately use this opportunity to present some ideas to them.

This is the iPhone/iPad version of the screen-sharing meeting tool. With the iOS version, you can login and share someone else's screen and share their presentation, but you can't host your own from your iPad.