Calendly is an app for scheduling appointments, meetings, and events.
Digistore24 is a German digital reselling and affiliate marketing platform.
Mautic is a free and open-source marketing automation tool for Content Management, Social Media, Email Marketing, and can be used for the integration of social networks, campaign management, forms, questionnaires, reports, etc.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.