WeTransfer - WeTransfer is a free service to send big or small files from A to B.
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.
Mega - Secure File Storage and collaboration
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
4Shared - 4shared is a perfect place to store your pictures, documents, videos and files, so you can share them with friends, family, and the world. Claim your free 15GB now!
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.