I want an Android Conference Calling App function similarly to iPhone’s built-in conferencing feature. The app must be able to mute one or more conferenced callers and be able to disconnect any of the currently connected callers. I want this app to be able to make calls to multiple contacts for conferencing. Like 3way calling but more callers.
I have a Motorola droid cell but I would like this app to work on more than just the moto droid. What’s your suggestion?

This is not a difficult app to visualize so I hope you can quote it based on what I've type so far. My budget is limited and I don’t want the app to be too complicated.