Dialogflow - Conversational UX Platform. (ex API.ai)
Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Felt for iPhone - Handwritten cards for the modern world
Botkit - Botkit is an open source developer tool for building chat bots, apps and custom integrations for major messaging platforms.
Thankbot - Drive more business with handwritten notes