FastCustomer - Telephone hold application.
HiOperator - HiOperator is a virtual assistant that answers phone calls, chats with customers, provides in-app help, takes orders, and provides support.
GetHuman - Find customer service numbers fast
Service - Customer service issues solved for you, on demand, for free.
Remotely.fm - The platform podcasters use to record remote interviews in studio quality. Nothing to install. Just hit record.
HelpStack - Open Source mobile help framework to support iOS and Android app users.