Mattermost
Description: Mattermost is an open-source, self-hosted online chat service with file sharing, search and integration capabilities. It supports text, images, videos and custom emojis across PCs and phones with instant notifications.
Type: software
Pricing: Freemium
Tinder
Description: Tinder is a popular dating and social networking app that allows users to swipe right to like or left to pass on potential matches. Matches can chat within the app. Tinder uses location-based services to show users potential matches near them.
Type: software