This Signs S3 URL in a easy windows GUI
This signs a S3 URL
Add an expire time
Don't give your keys to anyone, don't upload your keys to a website to sign you S3 URLs.
Clean tiny program easy to read over and see the program does one thing well.
This work is under http://creativecommons.org/licenses/by-nc-sa/3.0/
This is free to use and deploy, but not for commercial use.