- Postman
- Chrome Developer Tools | Netowrk
- Programmable Web directory
- twiiter - https://dev.twitter.com/overview/documentation
- facebook - https://developers.facebook.com/docs/graph-api/reference/v2.2/
- Government/ Demographics
- Weather: http://openweathermap.org/API
- Ruby ToolBox | API Builders
- Ruby ToolBox | API Clients