This Signs S3 URL in a easy windows GUI
Taret Windows/GUI/S3/C#/.NET/v3.5
This signs a S3 URL
Add an expire time
It makes something like this https://bucket.s3.amazonaws.com/folder/folder/file.html?AWSAccessKeyId=AAIJBKUWCWE5AIDP3GMV&Expires=2133721337&Signature=zpN5I/VVYZ0tWBKcxmIGbkTeJ0RN/X+aFu6WD2UN
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.
Enjoy:)
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.