OpenWeather API Free weather data up to 1 mil calls / month
PDF Generator API A flexible Web API and template editor for PDF generation
Awesome Weekly The most awesome stuff on the web in the past week
Serverless Stack Step-by-step tutorials for creating serverless React.js apps
Multivac Extensible ChatOps bot framework for Slack
Errbot A daemon that brings your tools into the chat room
Lita A robot companion for your company's chat room
Project Oxford A catalogue of artificial intelligence APIs by Microsoft
API Transformer Convert API descriptions from/to various formats