The creator of Twitter recently launched a messaging app called Bitchat that doesn’t require an internet connection to communicate with others. Instead, it uses Bluetooth to send and receive messages. The more people who join Bitchat, the more the network expands, creating a peer-to-peer mesh where each user becomes part of the communication chain. It can be a great way to stay connected when there’s no internet access, such as during natural disasters or government interference. Bitchat is available for both smartphones and computers, although it's currently still in beta.