Adobe Connect is, of course, an Adobe Flash-based conferencing solution when used in Windows and Mac OS but is also available as an app for iOS, Android, and Blackberry Playbook. Unlike the other offerings, video streams are limited only by available bandwidth. Adobe Connect even integrates with SIP/H.264 compatible devices to enrich the conference experience. This app is the only one in this list to offer on-site servers, keeping all conference traffic within your corporate environment. Pricing information appears to be tightly controlled by Adobe sales staff. Adobe has a similar free offering, Adobe ConnectNow, a part of Acrobat.com, which is limited to one-on-one communication but is also upgradable to additional attendees.
Screenshot of Adobe Connect app by Wally Bahny for TechRepublic