How well do you know dev tools?

Ruby? Simple and expressive. DigitalOcean? Great value. New Relic? Easy setup.

Can you identify which tool people use for the following reasons?

Integrates via easy-to-use REST API
Up and running in few minutes
It's easy to setup with the minimum coding

The leading OS for PC, tablet, phone and cloud
This is it!
Test your mobile apps/games on hundreds of real Android and iOS devices
This is it!
A Ruby static code analyzer, based on the community Ruby style guide
This is it!
Build scalable newsfeeds & activity streams in a few hours instead of months.
This is it!