Facebook Messenger is a free mobile messaging app used for instant messaging, sharing photos, videos, audio recordings and for group chats. The app, which is free to download, can be used to communicate with your friends on Facebook and with your phone contacts.

Keybase is a key directory that maps social media identities to encryption keys (including, but not limited to PGP keys) in a publicly auditable manner. Additionally it offers an end-to-end encrypted chat and cloud storage system, called Keybase Chat and the Keybase Filesystem.

Instagram is a free photo and video sharing app available on Apple iOS, Android and Windows Phone. People can upload photos or videos to our service and share them with their followers or with a select group of friends. They can also view, comment and like posts shared by their friends on Instagram.

Snapchat is a messaging app that lets users exchange pictures and videos (called snaps) that are meant to disappear after they're viewed. It's advertised as a "new type of camera" because the essential function is to take a picture or video, add filters, lenses or other effects and share them with friends.

GroupMe is an app that doesn't charge fees or have limits for direct and group messages. Users also can send photos, videos, and calendar links. Without fees or limits, students can share and text to their heart's content, which may mean they rarely put the phone down.

Discord started as a free splace for gamers to chat while playing video games but has become a bigger platform where users can use unlimited text, voice-chat, and video-chat to discuss a wide variety of topics.

SHAREit is the fastest cross-platform app for Android, iOS, PC & Mac. SHAREit allows you to transfer video, music, files and apps from one device to another. SHAREit has been downloaded by more than 500 million users, and has changed the way we transfer files.