Sometimes I need to help friends with bash scripting. When I'm on a Windows machine, it's a working environment and I can't just setup Cygwin or use a VM. Is there some free scripting website I can use, preferably where I can use Putty to connect it or something similar?
Is there an online bash script testing site?
bash
For a heavy weight solution, you can spin up an Amazon EC2 instance.  The free/trial tier is free for the first year of your account:http://aws.amazon.com/free/So, in that case, you'll have a wide choice of distros and shells to play with.