join.me. A tool for real-time audio and video conferencing. Free download for iOS and Android.
SyncPad. A cloud-based whiteboard for real-time collaboration on any mobile device or browser. Free download for iOS and Andriod.
WebEx. View shared content at meetings and participate in chat. Free download for iOS and Android.
Adobe Connect. A web conference tool to host, share and collaborate. Free download for both iOS and Andriod.