What are some alternatives?
Trillian - Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.
Unfuddle - Unfuddle is a secure, hosted project management solution for software development teams.
Jitsi - Open-source video calling and chat platform.
FireRTC - FireRTC is the easiest way to call from your computer for free
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Axosoft - Axosoft is proprietary software for project management.