https://goo.gl/f65Za
Specs?
Ubuntu 13.04, 64-bit, 614 MiB of RAM, 8 GiB storage. It’s an ec2 micro instance.
What’s the catch?
The server gets destroyed after 35 minutes. You can pay to keep it longer.
When would I use this?
Among other reasons, perhaps:
You need another computer to test something quickly
You need to install and use a utility for one thing, and don’t want to clutter your own environment
You need a vanilla environment to get something to build and run properly
You need linux but accidentally used windows